UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

(Rule 14a-101)

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No.    )

Filed by the Registrant  ☒                             Filed by a Party other than the Registrant  ☐

Check the appropriate box:

Mesa Air Group, Inc.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

NOTICE OF ANNUAL MEETING OF SHAREHOLDERS

and

20202021 Proxy Statement

The Annual Meeting of the Shareholders of Mesa Air Group, Inc. will be held:

Tuesday, February 4, 20202, 2021 at 2 p.m., Mountain Standard Time

DLA Piper LLP (US)Phoenix Gateway 3

2525 E. Camelback Road,410 N. 44^th Street, Suite 1000160,

Phoenix, Arizona 8501685008

410 North 44th Street, Suite 700

Phoenix, Arizona 85008

December 27, 201923, 2020

Dear Fellow Shareholder:

You are cordially invited to attend the 20202021 Annual Meeting of Shareholders for the fiscal year ended September 30, 20192020 (the “Annual Meeting”) of Mesa Air Group, Inc. The meeting will be held on Tuesday, February 4, 2020,2, 2021, at 2:00 p.m., Mountain Standard Time, at the offices of DLA Piper LLP (US), 2525 E. Camelback Road,Phoenix Gateway 3, 410 N. 44^th Street, Suite 1000,160, Phoenix, Arizona 85016.85008.

At the Annual Meeting, you will be asked to (i) elect sixseven directors to hold office until the next annual meeting and until their respective successors are duly elected and qualified, (ii) ratify the appointment of Ernst & Young LLP as our independent registered public accounting firm for the fiscal year ending September 30, 20202021 and (iii) transact any other business that may properly come before the Annual Meeting, or any adjournments or postponements thereof.

It is important that your shares be represented and voted, whether or not you plan to attend the Annual Meeting in person. You may vote on the Internet, by telephone or by completing and mailing a proxy card. Voting over the Internet, by telephone or by written proxy will ensure your shares are represented at the Annual Meeting. If you attend the Annual Meeting, you may revoke your proxy if you wish, and vote in person.

We thank you for your continued support and interest in Mesa Air Group.

Sincerely yours,

Jonathan G. Ornstein

Chairman, Chief Executive Officer and Director

This proxy statement is dated December 27, 2019,23, 2020, and is first being made available to shareholders on or about December 30, 2019.23, 2020.

NOTICE OF THE 20202021 ANNUAL MEETING OF SHAREHOLDERS

OF MESA AIR GROUP, INC.

By order of the Board of Directors,

Brian S. Gillman

Executive Vice President, General Counsel and Secretary

Phoenix, Arizona

December 27, 201922, 2020

IMPORTANT INFORMATION REGARDING THE AVAILABILITY OF PROXY MATERIALS

The Notice of Meeting, Proxy Statement, Proxy Card and our fiscal year 20192020 Annual Report, which includes our Annual Report onForm 10-K for the fiscal year ended September 30, 2019,2020, are available at www.proxyvote.com.

YOUR VOTE IS VERY IMPORTANT. PLEASE CAREFULLY READ THE ATTACHED PROXY STATEMENT. EVEN IF YOU PLAN TO ATTEND THE ANNUAL MEETING, PLEASE PROMPTLY COMPLETE, EXECUTE, DATE AND RETURN THE ENCLOSED PROXY CARD IN THE ACCOMPANYING POSTAGE-PAID ENVELOPE. NO POSTAGE IS NECESSARY IF MAILED IN THE UNITED STATES. YOU MAY ALSO VOTE ELECTRONICALLY VIA THE INTERNET OR BY TELEPHONE BY FOLLOWING THE INSTRUCTIONS ON THE PROXY CARD. IF YOU VOTE BY INTERNET OR TELEPHONE, THEN YOU NEED NOT RETURN A WRITTEN PROXY CARD BY MAIL. SHAREHOLDERS WHO ATTEND THE ANNUAL MEETING MAY REVOKE THEIR PROXIES AND VOTE IN PERSON IF THEY SO DESIRE. IN ACCORDANCE WITH OUR SECURITY PROCEDURES, ALL PERSONS ATTENDING THE ANNUAL MEETING WILL BE REQUIRED TO PRESENT PICTURE IDENTIFICATION.

* We are actively monitoring the health and safety concerns and government recommendations and restrictions relating to the COVID-19 pandemic. We are planning for the possibility that the Annual Meeting may be held at a different location, or solely by means of remote communication (i.e., a virtual-only Annual Meeting) if we determine it is not possible or advisable to hold an in-person meeting. We will announce any such updates as promptly as practicable, via a press release that will also be filed with the SEC as additional proxy materials. Please check the “Investors” page of our website at www.mesa-air.comand our Annual Meeting website at www.proxyvote.com prior to the meeting date. As always, we encourage you to vote your shares prior to the Annual Meeting.

TABLE OF CONTENTS

i

410 North 44th Street, Suite 700

Phoenix, Arizona 85008

PROXY STATEMENT

FOR 20202021 ANNUAL MEETING OF SHAREHOLDERS

To be held on Tuesday, February 4, 20202, 2021

Questions and Answers

about Proxy Materials and Voting

This Proxy Statement, the accompanying Notice of Annual Meeting, proxy card and the Annual Report to Shareholders of Mesa Air Group, Inc. (the “Company,” “Mesa Air Group,” “we, “us” and “our”) are being mailed on or about January 3, 2019.December 30, 2020. You should read this entire Proxy Statement (this “Proxy Statement”) carefully for information about the proposals to be presented at our 20202021 Annual Meeting of Shareholders for the fiscal year ended September 30, 20192020 (our “Annual Meeting”). Information contained on, or that can be accessed through, our website is not a part of this Proxy Statement.

The information in the “question and answer” format below is for your convenience only and provides essential information about the proxy materials and how to cast your vote at our Annual Meeting.

What is a proxy?

Our Board of Directors (our “Board”) is asking for your proxy. This means you authorize persons selected by the Company to vote your shares at our Annual Meeting in the way that you instruct. All shares represented by valid proxies that are received and not revoked before our Annual Meeting will be voted at our Annual Meeting in accordance with the shareholder’s specific voting instructions.

Why am I receiving these materials?

You are receiving these materials because at the close of business on December 9, 20197, 2020 (the “Record Date”), you owned shares of our common stock, no par value per share. All shareholders of record on the Record Date are entitled to attend and vote at our Annual Meeting.

Each such share of our common stock is entitled to vote at our Annual Meeting. On the Record Date, we had 32,362,48935,532,494 shares of common stock outstanding. With respect to all of the matters submitted for vote at our Annual Meeting, each share of common stock is entitled to one vote.

What information is contained in this Proxy Statement?

This Proxy Statement includes information about the nominees for directors and other matters to be voted on at our Annual Meeting. It also explains the voting process and requirements; describes the compensation of our principal executive officer, principal financial officer and our other most highly compensated executive officerofficers (collectively referred to as our “named executive officers” or “NEOs”); describes the compensation of our directors; and provides certain other information that the U.S. Securities and Exchange Commission (the “SEC”) rules require.

What should I do with these materials?

Please carefully read and consider the information contained in this Proxy Statement and then vote your shares as soon as possible to ensure that your shares will be represented at our Annual Meeting. You may vote your shares prior to our Annual Meeting even if you plan to attend our Annual Meeting in person.

What shares are included on my proxy card?

You will receive one proxy card for all the shares of our common stock that you hold as a shareholder of record (in certificate form or in book-entry form).

If you hold your shares in street name, you will receive voting instructions for each account you have with a broker, bank or other nominee.

What matters am I voting on, how may I vote on each matter and how does our Board recommend that I vote on each matter?

The following table sets forth a description of each of the proposals you are being asked to vote on, how you may vote on each proposal and how our Board recommends that you vote on each proposal:

What is the difference between holding shares as a shareholder of record and as a beneficial owner?

If your shares are registered directly in your name with the Company’s transfer agent, Computershare Inc., you are considered the “shareholder of record” with respect to those shares. The full set of proxy materials has been sent directly to you.

If your shares are held with a broker or in an account at a bank, you are considered the “beneficial owner” with respect to those shares. These shares are sometimes referred to as being held “in street name.” The full set of proxy materials would have been forwarded to you by your broker, bank or other holder of record who is considered the shareholder of record with respect to those shares. As the beneficial owner, you have the right to direct your broker, bank or other nominee on how to vote your shares by using the voting instruction card included in the mailing or by following the instructions on the enclosed proxy card for voting online or by telephone. You will not be able to vote these shares directly unless you obtain a signed legal proxy from your broker, bank or other nominee giving you the right to vote the shares.

How do I vote if I am the shareholder of record?

As a shareholder of record, you may vote your shares in any one of the following ways:

Whether or not you plan to attend our Annual Meeting, we urge you to vote. Returning the proxy card or voting by telephone or online will not affect your right to attend our Annual Meeting and vote in person.

How do I vote if I am a beneficial owner?

As the beneficial owner, you have the right to direct your broker, bank or other nominee how to vote your shares by following the instructions that your broker, bank or other nominee sent to you. You will receive proxy materials and voting instructions for each account that you have with a broker, bank or other nominee. As a beneficial owner, if you wish to change the voting instructions that you have provided your broker, bank or other nominee, you should follow the instructions that your broker, bank or other nominee sent to you.

As a beneficial owner, you are also invited to attend our Annual Meeting. However, since you are not the shareholder of record, you may not vote your shares in person at the meeting unless you obtain a signed legal proxy from your broker, bank or other nominee giving you the right to vote the shares.

What if I am a beneficial owner and do not give voting instructions to my broker?

If you are a beneficial owner of shares, your broker, bank or other nominee is not permitted to vote on your behalf on the election of directors and any other matters to be considered at the Annual Meeting, except for Proposal 2 (the ratification of the appointment of Ernst & Young LLP as our independent registered public accounting firm for the fiscal year ending September 30, 2021), unless you provide specific instructions by completing and returning the voting instruction form or following the instructions provided to you to vote your shares on the Internet or by telephone. If you do not provide voting instructions, your shares will not be voted on any proposal except for Proposal 2. This is called a “broker non-vote”. For your vote to be counted, you will need to communicate your voting decision to your broker, bank or other nominee before the date of the Annual Meeting.

How can I attend our Annual Meeting?

You are entitled to attend our Annual Meeting only if you were a shareholder of record as of the Record Date or you hold a valid proxy for our Annual Meeting as described in the previous question. Because

seating is limited, admission to the meeting will be on a first-come, first-served basis. You should be prepared to present photo identification for admittance. If you are not a shareholder of record but hold shares as a beneficial owner, you should provide proof of beneficial ownership as of the Record Date, such as your most recent account statement prior to December 9, 2019,7, 2020, a copy of the voting instruction card provided by your broker, bank or other nominee, or other similar evidence of ownership.

What can I do if I change my mind after I vote?

If you are a shareholder of record, you can revoke your proxy and/or change your vote any time before completion of voting at our Annual Meeting as follows:

person or by proxy. Shareholders of record who return a proxy or vote in person at our Annual Meeting will be considered part of the quorum. Abstentions and broker non-votesare counted as “present” for determining a quorum.

How are votes counted?

In the election of the sixseven directors, your vote may be cast “FOR” all of the nominees or your vote may be “WITHHELD” with respect to one or more of the nominees. If you withhold your vote with respect to any nominee, your shares will not be considered to have been voted for or against the nominee. Broker discretionary voting is not allowed for the election of directors.

For all other proposals, your vote may be cast “FOR” or “AGAINST,” or you may “ABSTAIN.” If you “ABSTAIN,” it has the same effect as a vote “AGAINST.” If you sign your proxy card with no further instructions and you are a shareholder of record, then your shares will be voted in accordance with the recommendations of our Board. Broker discretionary voting is allowed for Proposal 2.

Who will count the votes?

Our Executive Vice President, General Counsel and Secretary, Brian S. Gillman, will tabulate the votes and act as the inspector of election.

Where can I find the voting results?

We will announce the preliminary voting results at our Annual Meeting. We will also publish voting results in a Current Report on Form8-K that we will file with the SEC within four business days of our Annual Meeting. If on the date of such Form8-K filing the inspector of election for our Annual Meeting has not certified the voting results as final, we will note in the filing that the results are preliminary and publish the final results in a subsequent Form8-K filing within four business days after the final voting results are known.

Who will pay the costs of soliciting these proxies?

We will bear the entire cost of solicitation of proxies, including preparation, assembly, printing and mailing of this Proxy Statement, the proxy card and any additional information furnished to

shareholder proposals. Notice of director nominations and shareholder proposals must be mailed to our Executive Vice President, General Counsel and Secretary at 410 North 44th Street, Suite 700, Phoenix, Arizona 85008. The requirements for advance notice of shareholder proposals under our Second Amended and Restated Bylaws do not apply to proposals properly submitted under Rule14a-8 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), as those shareholder proposals are governed by Rule14a-8. We reserve the right to reject, rule out of order or take other appropriate action with respect to any director nomination or shareholder proposal that does not comply with our Second Amended and Restated Bylaws and other applicable requirements.

August 29, 202031, 2021 is the deadline for shareholders to submit proposals to be included in our proxy statement under Rule14a-8 under the Exchange Act. However, if the date of our annual meeting of shareholders for the fiscal year ending September 30, 20202021 is changed by more than 30 days from the anniversary of the date of the previous year’s meeting, then the deadline will be a reasonable time before we begin to print and send our proxy statement for our annual meeting of shareholders for the fiscal year ending September 30, 2020.2021. Proposals by shareholders must comply with all requirements of applicable rules of the SEC, including Rule14a-8, and be mailed to our Executive Vice President, General Counsel and Secretary at 410 North 44th Street, Suite 700, Phoenix, Arizona 85008. We reserve the right to reject, rule out of order or take other appropriate action with respect to any proposal that does not comply with Rule14a-8 and other applicable requirements.

Board of Directors

and Corporate Governance

We are strongly committed to good corporate governance practices. These practices provide an important framework within which our Board and management can pursue our strategic objectives for the benefit of our shareholders. Our Board has adopted Amended and Restated Corporate Governance Guidelines (our “Corporate Governance Guidelines”) that set forth the role of our Board, director independence standards, Board structure and functions, director selection considerations and other governance policies. In addition, our Board has adopted written charters for each of our Audit Committee, Compensation Committee and Nominating and Corporate Governance Committees,Committee, as well as the Mesa Air Group, Inc. Code of Conduct and Ethics (our “Code of Conduct”) that applies to all of our employees, officers and directors. Our Nominating and Corporate Governance Committee reviews our Corporate Governance Guidelines annually, and recommends changes to our Board as warranted. Our Corporate Governance Guidelines, our committee charters, and our Code of Conduct, and any waivers or amendments to our Code of Conduct, are all available on our investor relations website (http://investor.mesa-air.cominvestor.mesa-air.com) in the “Corporate Governance – Governance Overview” section.

Director Independence

Our common stock is listed on The Nasdaq Global Select Market (“Nasdaq”). Under the listing requirements and rules of Nasdaq, independent directors must comprise a majority of our Board. In addition, the rules of Nasdaq require that, subject to specified exceptions, each member of a listed company’s audit, compensation and nominating and corporate governance committees be independent. Under Nasdaq rules, a director will only qualify as an “independent director” if, in the opinion of that company’s board of directors, that person does not have a relationship that would interfere with the exercise of independent judgment in carrying out the responsibilities of a director. Compensation committee members must not have a relationship with us that is material to the director’s ability to be independent from management in connection with the duties of a compensation committee member. Additionally, audit committee members must also satisfy the independence criteria set forth in Rule10A-3 under the Exchange Act. To be considered independent for purposes of Rule10A-3, a member of an audit committee of a listed company may not, other than in his or her capacity as a member of the audit committee, the board of directors or any other board committee, accept, directly or indirectly, any consulting, advisory or other compensatory fee from the listed company or any of its subsidiaries or be an affiliated person of the listed company or any of its subsidiaries.

Our Board has undertaken a review of its composition, the composition of its committees and the independence of each director. Based upon information requested from and provided by each director concerning his or her background, employment and affiliations, including family relationships, our Board has determined that other than Jonathan G. Ornstein, our Chairman and Chief Executive Officer, our directors do not have any relationships that would interfere with the exercise of independent judgment in carrying out the responsibilities of a director and that each of these directors is “independent” as that term is defined under the applicable rules and regulations of the SEC and the listing requirements and rules of Nasdaq. Accordingly, a majority of our directors are independent, as required under applicable Nasdaq listing rules. In making this determination, our Board considered the current and prior relationships that eachnon-employee director has with the Company and all other facts and circumstances our Board deemed relevant in determining their independence.

Board Leadership

Although our Board does not have a formal policy as to whether the roles of Chairman of our Board and Chief Executive Officer should be combined or separated, Mr. Ornstein serves as both the Chairman of our Board and our Chief Executive Officer. Our Board believes that the current board

leadership structure, coupled with a strong emphasis on board independence, provides effective

Audit Committee

Our Audit Committee consists of Ms. Artist and Messrs. Gordon and Lockhart, with Ms. Artist serving as our Audit Committee Chair. Pursuant to our Audit Committee charter, Audit Committee membership shall consist of at least three Board members, all of whom qualify as independent within the meaning of our Corporate Governance Guidelines and satisfy the independence requirements of the Nasdaq Listing Rules and Rule10A-3(b)(1) under the Exchange Act. Our Audit Committee charter also requires members to have financial literacy and familiarity with fundamental financial statements that would allow them to understand key business and financial controls in the primary industries in which we operate.

Our Board has determined that Ms. Artist and Messrs. Gordon and Lockhart are independent under the Nasdaq Listing Rules and Rule10A-3(b)(1) under the Exchange Act. In addition, our Board has determined that Ms. Artist is an “audit committee financial expert” within the meaning of SEC regulations. Our Board has also determined that each member of our Audit Committee can read and understand fundamental financial statements in accordance with applicable requirements. In arriving at these determinations, our Board has examined each Audit Committee member’s scope of experience and the nature of their employment in the corporate finance sector.

The primary purpose of our Audit Committee is to discharge the responsibilities of our Board with respect to our accounting, financial and other reporting and internal control practices and to oversee our independent registered public accounting firm. Specific responsibilities of our Audit Committee include:

Compensation Committee

Our Compensation Committee currently consists of Messrs. Gordon, LyonMcHugh and Schiller, with Mr. Schiller serving as our Compensation Committee Chair. Pursuant to our Compensation Committee charter, members of our Compensation Committee will consist of a minimum of three directors, each of whom shall meet Nasdaq’s independence requirements. Our Board has determined each member of

The primary purpose of our Compensation Committee is to discharge the responsibilities of our Board to oversee our compensation policies, plans and programs, and to review and determine the compensation to be paid to our executive officers, directors and other senior management, as appropriate. Specific responsibilities of our Compensation Committee include:

Compensation Committee Interlocks and Insider Participation

None of the members of our Compensation Committee is or has been an executive officer of Mesa Air Group, nor did any of them have any relationships requiring disclosure by us under Item 404 of SECRegulation S-K. With the exception of Mr. Ornstein, our Chairman and Chief Executive Officer, none of our executive officers served as a director or a member of a compensation committee (or other committee serving an equivalent function) of any other entity, of which an executive officer served as a director of Mesa Air Group or member of our Compensation Committee during the fiscal year ended September 30, 2019.2020.

Nominating and Corporate Governance Committee

Our Nominating and Corporate Governance Committee currently consists of Ms. Artist and Messrs. Schiller and Skiados, with Mr. Skiados serving as our Nominating and Corporate Governance Committee Chair. Pursuant to our Nominating and Corporate Governance Committee charter, our Nominating and Corporate Governance Committee shall consist of at least three directors, each of whom shall meet Nasdaq’s independence requirements. Our Board has affirmatively determined that each of Ms. Artist and Messrs. Schiller and Skiados meet the definition of “independent director” for purposes of the Nasdaq Listing Rules.

Specific responsibilities of our Nominating and Corporate Governance Committee include:

Board and Committee Meetings and Attendance

Our Board is responsible for the oversight of Company management, the strategy of the Company and establishing corporate policies. Our Board and its committees meet throughout the year on a regular schedule, and also hold special meetings and act by written consent from time to time. During the fiscal year ended September 30, 2019,2020, our Board met sixfour times. Each of the four regularly scheduled Board meetings included an executive session of only independent directors. Our Audit Committee met eightseven times during the last fiscal year. Our Compensation Committee met fourfive times during the last fiscal year. Our Nominating and Corporate Governance Committee met fivesix times during the last fiscal year. During the fiscal year ended September 30, 2019,2020, each director attended 75% or more of the aggregate number of Board meetings and meetings of the committees on which he or she served. We traditionally encourage our directors and director nominees to attend our Annual Meeting.Meetings. All of our current directors attended our annual meeting of shareholders in 2019.2020. However, due to the ongoing worldwide COVID-19 pandemic we are not encouraging our directors or director nominees to attend our 2021 Annual Meeting in person.

Risk Oversight

Our Board oversees an enterprise-wide approach to risk management, designed to support the achievement of organizational objectives, including strategic objectives, to improve long-term organizational performance and to enhance shareholder value. A fundamental part of risk management is not only understanding the most significant risks a company faces and what steps management is taking to manage those risks, but also understanding what level of risk is appropriate for a given company. Our Board, as a whole, determines the appropriate level of risk for us, assesses the specific risks that we face and reviews management’s strategies for adequately mitigating and managing the identified risks. Although our Board administers this risk management oversight function, the committees of our Board support our Board in discharging its oversight duties and addressing risks inherent in their respective areas.

Our Audit Committee has the responsibility to consider and discuss our major financial risk exposures and the steps our management has taken to monitor and control these exposures, including guidelines and policies to govern the process by which risk assessment and management is undertaken. Our Audit Committee monitors compliance with legal and regulatory requirements. Our Audit Committee also monitors management’s preparedness for and responses to data security incidents. Our Nominating and Corporate Governance Committee monitors the effectiveness of our Corporate Governance Guidelines. Our Compensation Committee assesses and monitors whether our compensation philosophy and practices have the potential to encourage excessive risk-taking and evaluates compensation policies and practices that could mitigate such risks.

At periodic meetings of our Board and its committees, management reports to and seeks guidance from our Board and its committees with respect to the most significant risks that could affect our business, such as legal, financial, tax and audit-relatedaudit- related risks. In addition, among other matters, management provides our Audit Committee periodic reports on our compliance programs and investment policy and practices.

Nominations Process and Director Qualifications

Nomination to our Board of Directors

Candidates for nomination to our Board are selected by our Board based on the recommendations of our Nominating and Corporate Governance Committee in accordance with our Nominating and Corporate Governance Committee charter, our policies, our Second Amended and Restated Articles of Incorporation, our Second Amended and Restated Bylaws, our Corporate Governance Guidelines and the criteria adopted by our Board regarding director candidate qualifications. In recommending candidates for nomination, our Nominating and Corporate Governance Committee considers candidates recommended by directors, officers and employees, as well as candidates that are properly submitted by shareholders in accordance with our policies and our Second Amended and Restated Bylaws, using the same criteria to evaluate all such candidates. Evaluations of candidates generally involve a review of background materials, internal discussions and interviews with selected candidates as appropriate and, in addition, our Nominating and Corporate Governance Committee may engage consultants or third-party search firms to assist in identifying and evaluating potential director nominees.

Mr. McHugh was appointed as a member of the Board of Directors, effective May 5, 2020. The Nominating and Corporate Governance Committee led the process for selecting the director nominee and recommending the selected nominee to the Board. Mr. McHugh was recommended to the Nominating and Corporate Governance Committee by the Chief Executive Officer.

Additional information regarding the process for properly submitting shareholder nominations for candidates for membership on our Board is set forth above under “Questions and Answers About Proxy Materials and Voting.”

Director Qualifications

With the goal of developing a diverse, experienced and highly qualified board of directors, our Nominating and Corporate Governance Committee is responsible for developing and recommending to our Board the desired qualifications, expertise and characteristics of members of our Board, including qualifications that our Nominating and Corporate Governance Committee believes must be met by a committee-recommended nominee for membership on our Board and specific qualities or skills that our Nominating and Corporate Governance Committee believes are necessary for one or more of the members of our Board to possess.

In addition to the qualifications, qualities, and skills that are necessary to meet U.S. legal and regulatory requirements, Nasdaq’s listing requirements, the provisions of our Second Amended and Restated Articles of Incorporation and our Second Amended and Restated Bylaws, our Corporate Governance Guidelines and each of the charters of our Board committees, our Nominating and Corporate Governance Committee requires the following minimum qualifications to be satisfied by any nominee for a position on our Board:

Our Board and Nominating and Corporate Governance Committee believe that a diverse,diversely skilled, experienced and highly qualified board of directors fosters a robust, comprehensive and balanced decision-making process for the continued effective functioning of our Board and success of the Company. Accordingly,

PROPOSAL 1:

ELECTION OF DIRECTORS

(Item No. 1 on the Proxy Card)

Composition of our Board of Directors

Our Board currently consists of seven directors. All directors serve aone-year term and are subject tore-election each year. One of our directors, Mr. Lyon, is not standing forre-election at our Annual Meeting. Accordingly, the Board intends to fill the vacancy created by Mr. Lyon’s departure in 2020 after a thorough search has been completed by the Nominating and Corporate Governance Committee.

On the recommendation of our Nominating and Corporate Governance Committee, our Board has nominated the following persons for election as directors at our Annual Meeting:

If elected, each nominee will serve until his or her term expires at our annual meeting of shareholders for the fiscal year ending September 30, 20202021 or until his or her successor is duly elected and qualified. See “Director Nominees” below for more information about each nominee.

All of the nominees are currently serving as directors of Mesa Air Group and have consented to being named as nominees. Shareholders voting in person or by proxy at our Annual Meeting may only vote for sixseven nominees. If, prior to our Annual Meeting, any of the nominees becomes unable to serve as a director, our Board may designate a substitute nominee. In that event, the persons named as proxies intend to vote for the substitute nominee designated by our Board.

Our Board and our Nominating and Corporate Governance Committee believe that each of the above nominees possesses the experience and qualifications that directors of Mesa Air Group should possess, as described in detail below, and that the experience and qualifications of each nominee compliments the experience and qualifications of the other nominees. The experience and qualifications of each nominee, including information regarding the specific experience, qualifications, attributes and skills that led our Board and our Nominating and Corporate Governance Committee to conclude that he or she should serve as a director of Mesa Air Group at the present time, in light of our business and structure, are set forth below.

Vote Required

If a quorum is present, directors are elected by a plurality of the votes of the holders of shares present at the meeting or represented by proxy and entitled to vote on the election of directors. Accordingly, the nominees receiving the highest number of affirmative votes will be elected. Shares represented by executed proxies will be voted, if authority to do so is not withheld, for the election of the nominees named below. If a nominee becomes unavailable for election as a result of an unexpected occurrence, shares that would have been voted for that nominee will instead will be voted for the election of a substitute nominee proposed by us.

Our Board recommends a vote“vote“FOR”the election of all sixseven nominees listed below.

Director Nominees

Jonathan G. Ornstein

Ellen N. Artist

Mitchell I. Gordon

Dana J. Lockhart

Daniel J. McHugh

Jonathan G. Ornstein

Spyridon P. Skiados

Brigadier General Harvey W. Schiller, USAF, Ret.

Non-Employee Director Compensation

Fees. The following fees were paid to ournon-employee directors during the 20192020 election year. Directors who are our full-time employees receive no additional compensation for serving as directors. Board members are also reimbursed for all expenses associated with attending Board or committee meetings.

The following table sets forth information concerning the compensation earned by or paid to ournon-employee directors during the fiscal year ended September 30, 2019:2020:

Equity Awards. Equity awards are made to ournon-employee directors on an annual basis. The types and amounts of such awards are set by our Compensation Committee. During the fiscal year ended September 30, 2019,2020, eachnon-employee director received a restricted common stock award in the aggregate amount of $89,700.

Other benefits. As is common in the airline industry, we provide flight benefits to the members of our Board, whereby eachnon-employee director and certain family members of directors receive free or reduced-fare travel on flights flown by our major airline partners at no cost to us or the director. We believe that our directors’ use of free air travel is de minimis and we did not maintain any records ofnon-employee directors’ travel during the fiscal year ended September 30, 2019.2020.

Report of the Audit Committee

The Audit Committee has reviewedselects and discussedretains an independent registered public accounting firm as the auditedCompany’s independent auditor and assists the Board in overseeing (1) the integrity of the Company’s financial statements, (2) the independent auditor’s qualifications and independence, (3) the performance of the Company’s internal audit function and independent auditor, and (4) the compliance by the Company with legal and regulatory requirements related to financial affairs and reporting. The Board of Directors has adopted a written charter for the Audit Committee that addresses the responsibilities of the Audit Committee. This charter is available on our investor relations website (http://investor.mesa-air.com) in the “Corporate Governance – Governance Overview” section.

While the Audit Committee has the responsibilities and powers set forth in its charter, it is not the duty of the Audit Committee to plan or conduct audits or to determine that the Company’s financial statements and disclosures are complete and accurate and are in accordance with generally accepted accounting principles and applicable legal and other requirements. These are the responsibilities of management and the independent auditor. Additionally, in performing its oversight function, the Audit Committee necessarily relies on the work and assurances of, and information provided by, management and the independent auditor.

Ernst & Young LLP (“Ernst & Young”) served as the Company’s independent auditor for the fiscal year ended September 30, 20192020. In fiscal 2020, the Audit Committee met and held discussions with management and Ernst & Young on numerous occasions. In fulfilling its oversight responsibilities, the Audit Committee reviewed and discussed with management and Ernst & Young the Company’s quarterly financial statements prior to the filing of Mesa Air Group.each Quarterly Report on Form 10-Q and the audited financial statements included in the Annual Report on Form 10-K for the fiscal year ended September 30, 2020. The Audit Committee has discussed with the Company’s independent registered public accounting firm, DeloitteErnst & Touche LLP, theYoung matters required to be discussed by the applicable Public Company Accounting Oversight Board (“PCAOB Auditing Standards No. 1301, “Communications with Audit Committees.” The) standards. Ernst & Young also provided to the Audit Committee has also received the written disclosures and the letter from the Company’s independent registered public accounting firm required by applicable requirements of the PCAOB regarding the independent accountants’accountant’s communications with the Audit Committee concerning independence, and has discussed with the independent registered public accounting firm the accounting firm’s independence. Based on the foregoing, the Audit Committee hasdiscussed with Ernst & Young the firm’s independence and tenure.

Based upon the Audit Committee’s discussions with management and the independent auditor, and the Audit Committee’s review of the representations of management and the report of the independent auditor to the Audit Committee, the Audit Committee recommended to ourthe Board of Directors that the audited financial statements be included in the Company’s Annual Report on Form10-K for the fiscal year ended September 30, 2019.2020, as filed with the SEC.

TheSubmitted by the Audit Committee

Ellen N. Artist (Chair)

Mitchell I. Gordon

Dana J. Lockhart

The material in this report is not “soliciting material,” is not deemed “filed” with the SEC or subject to Regulations 14A or 14C or the liabilities of Section 18 of the Exchange Act, and shall not to be deemed incorporated by reference in any filing of Mesa Air Group under the Securities Act of 1933, as amended, or the Exchange Act, whether made before or after the date hereof and irrespective of any general incorporation language in any such filing.

PROPOSAL 2:

RATIFICATION OF APPOINTMENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

(Item No. 2 on the Proxy Card)

Our Board andIt is the responsibility of the Audit Committee engagedto select and retain independent auditors. Our Audit Committee has appointed Ernst & Young LLP, effective as of December 26, 2019, asour independent auditors for the Company’s independent registered public accounting firm beginning with the audit for the fiscal year ending September 30, 2020, including2021. Although shareholder ratification of the 2020 quarterly reviews. The decision to dismiss DeloitteAudit Committee’s selection of independent auditors is not required by our Second Amended and Restated Bylaws or otherwise, we are submitting the selection of Ernst & Touche LLP was madeYoung for shareholder ratification as parta matter of a competitive bidding process to determine the Company’s independent registered public accounting firm for the fiscal year ending September 30, 2020. Our Board, upon recommendation fromgood corporate governance and so that our shareholders may participate in this important corporate decision. If not ratified, the Audit Committee has further directed that we submitwill reconsider the selection, although the Audit Committee’sCommittee will not be required to select different independent auditors for the Company. Even if the appointment is ratified, our Board may direct the appointment of different independent auditors at any time during the year if they determine that such a change would be in the best interests of Mesa Air Group and its shareholders.

A representative of Ernst & Young LLP as our independent registered public accounting firm for ratification by our stockholdersis expected to be present at the Annual Meeting.Meeting and will be available to respond to appropriate questions and, if they desire, to make a statement.

Change of Auditors in December 2019

Deloitte & Touche LLP (“Deloitte & Touche”) previously was engaged to audit our consolidated financial statements for the year ended September 30, 2019 and was dismissed as our independent registered public accounting firm on December 26, 2019. During the Company’s two most recent fiscal years ended September 30, 2019 and September 30, 2018, there were no (1) disagreements with Deloitte & Touche LLP on any matter of accounting principles or practices, financial statement disclosures, or auditing scope or procedures, which disagreements, if not resolved to the satisfaction of Deloitte & Touche, LLP, would have caused Deloitte & Touche LLP to make reference to the subject matter of the disagreements in connection with its reports; and (2) events of the type listed in paragraphs (A) through (D) of Item 304(a)(1)(v) of RegulationS-K.

The audit reports of Deloitte & Touche LLP on the Company’s consolidated financial statements as of and for the years ended September 30, 2019 and 2018 did not contain any adverse opinion or disclaimer of opinion, nor were they qualified or modified as to uncertainty, audit scope or accounting principles.

During the Company’s two most recent fiscal years ended September 30, 2019 and 2018, neither the Company nor anyone acting on its behalf consulted with Ernst & Young LLP regarding either: (i) the application of accounting principles to a specified transaction, either completed or proposed; or the type of audit opinion that might be rendered on the Company’s financial statements, and neither a written report nor oral advice was provided to the Company that Ernst & Young LLP concluded was an important factor considered by the Company in reaching a decision as to the accounting, auditing or financial reporting issue; or (ii) any matter that was either the subject of a disagreement (as defined in paragraph (a)(1)(iv) of Item 304 of RegulationS-K and the related instructions thereto) or a reportable event (as described in paragraph (a)(1)(v) of Item 304 of RegulationS-K).

We are asking our stockholders to ratify the selection of Ernst & Young LLP as our independent registered public accounting firm for the year ending September 30, 2020. Although ratification is not required by our Bylaws or otherwise, the Board is submitting the selection of Ernst & Young LLP to our stockholders for ratification because we value our stockholders’ views on the Company’s independent registered public accounting firm and as a matter of good corporate practice.

VOTE REQUIRED

An affirmative vote from holders of a majority in voting power of the shares present at the Annual Meeting or represented by proxy and entitled to vote on the proposal is required to ratify the selection of Ernst & Young LLP as the Company’s independent registered public accounting firm for the fiscal year ending September 30, 2020. Even if the selection is ratified, however, the Audit Committee may in its discretion select a different independent registered public accounting firm at any time during the year if it determines that such a change would be in the best interests of the Company and of our stockholders.

next year. However, because of the difficulty in making any substitution of auditors after the beginning of the current year, the appointment for 20202021 will stand, unless the Audit Committee determines there is a reason to make a change.

Our Board recommends a vote “FOR” the ratification of Ernst & Young LLP as our independent registered public accounting firm for the fiscal year ending September 30, 2020.2021.

AUDIT ANDNON-AUDIT FEES

The following table provides the aggregatepresents fees for professional audit services providedrendered by (i) Deloitte & Touche, our independent auditors for the fiscal year ended September 30, 2019, and (ii) Ernst & Young LLP, our independent auditors for the fiscal yearsyear ended September 30, 2019 and September 30, 2018:2020:

POLICY ON AUDIT COMMITTEEPRE-APPROVAL OF AUDIT AND PERMISSIBLENON-AUDIT SERVICES OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Consistent with the requirements of the SEC and the Public Company Accounting Oversight Board (the “PCAOB”) regarding auditor independence, our Audit Committee has responsibility for appointing, setting compensation, retaining and overseeing the work of our independent registered public accounting firm. In recognition of this responsibility, our Audit Committee has adopted a policy and procedures for thepre-approval of audit andnon-audit services rendered by our independent registered public accounting firm to the Company. The policy generallypre-approves specified services in the defined categories of audit services, audit-related services and tax services up to specified amounts.Pre-approval may also be given as part of our Audit Committee’s approval of the scope of the engagement of the independent auditor or on an individual, explicit andcase-by-case basis before the independent auditor is engaged to provide each service. All of the services provided by Ernst & Young for the fiscal year ended September 30, 2020 and all services proved by Deloitte & Touche LLP for the fiscal yearsyear ended September 30, 2019 and 2018 described above werepre-approved by our Audit Committee or our Board. Our Audit Committee determined that the rendering of services other than audit services by Ernst & Young and Deloitte & Touche LLP was compatible with maintaining the principal accountant’s independence.

Security Ownership of Certain Beneficial Owners and Management

The table below sets forth certain information with respect to the beneficial ownership of our common stock as of December 9, 2019:7, 2020 by:

The percentage of shares beneficially owned listed in the table below is based on 32,362,48935,532,494 shares of our common stock outstanding as of December 9, 2019.7, 2020. In computing the number of shares beneficially owned and the percentage ownership of each of the beneficial owners listed in the table below, we deemed to be outstanding all shares of restricted common stock that have vested or will vest within 60 days of December 9, 2019,7, 2020, and all warrants exercisable within 60 days of December 9, 2019. In some cases, we believe that foreign ownership may limit the ability of warrant holders to exercise warrants they hold, meaning that such holder may not be required, under relevant rules and regulations, to report beneficial ownership, as the holder would not be entitled to receive the underlying shares of common stock.

7, 2020. Beneficial ownership is determined in accordance with the rules of the SEC and generally includes any shares over which a person exercises sole or shared voting or investment power. Unless otherwise indicated, the persons or entities identified in the table below have sole voting and investment power with respect to all shares shown to be beneficially owned by them, subject to applicable community property laws. The information contained in the table below is not necessarily indicative of beneficial ownership for any other purpose, and the inclusion of any shares in the table below does not constitute an admission of beneficial ownership of those shares. Except as otherwise noted below, the address for persons listed in the table below is c/o Mesa Air Group, Inc., 410 North 44th Street, Suite 700, Phoenix, Arizona 85008. The information provided in the table below is based on our records, information filed with the SEC and information provided to us, except where otherwise noted:

Executive Officers

In addition to Mr. Ornstein, the table below sets forth biographical information for each of our executive officers not discussed above, as of the date of this Proxy Statement:

Michael J. Lotz. Mr. Lotz serves as our President and Chief Financial Officer, and has been with us since 1998, serving as President since 2000. From 1995 to 1998, Mr. Lotz worked with Mr. Ornstein, first at Continental Express as senior director of purchasing, later as vice president of airport operations, and then at Virgin Express S.A./N.V.in Brussels as chief operating officer, where the two eventually took the company public. From 1987 to 1995, Mr. Lotz served in various roles at Continental Airlines, ultimately serving as senior director of contract services and airport administration. Mr. Lotz received a B.B.AB.B.A. in Financial Accounting from Iona College.

Brian S. Gillman. Mr. Gillman has served as our Executive Vice President, General Counsel and Secretary since 2013. From February 2011 to September 2013, Mr. Gillman served as executive vice

Executive Compensation

Our NEOs, consisting of our principal executive officer and our next three most highly compensated executive officers as of September 30, 2019,2020, were:

Processes and Procedures for Compensation Decisions

Our Compensation Committee is responsible for the executive compensation programs for our executive officers and reports to our Board on its discussions, decisions and other actions. Our Chief Executive Officer, and from time to time as necessary, in consultation with our Chief Financial Officer, makes recommendations to our Compensation Committee regarding short-term and long-term compensation for all of our executive officers (other than himself) based on our results, as well as an individual executive officer’s contribution toward thesethe Company’s results and their performance toward individual goal achievement. Our Compensation Committee then reviews the recommendations and other data and makes decisions as to the total compensation for each executive officer, as well as each individual compensation component.

During 2019, the Compensation Committee engaged Mercer LLC. (“Mercer”), an independent executive compensation advisory firm, as the Compensation Committee’s independent compensation advisor. In doing so the Compensation Committee reviewed information regarding the independence and potential conflicts of interest of Mercer. The Compensation Committee members took into account, among other things, the factors enumerated by the SEC and the NASDAQNasdaq for evaluating compensation advisor independence, and concluded that Mercer is independent and that no conflict of interest exists. Representatives of Mercer have direct access to Compensation Committee members without management involvement. The Compensation Committee at any time has sole authority to replace its compensation consultant and/or legal counsel from time to time and hire additional consultant, legal counsel and such other advisors as necessary to assist with the execution of its duties and responsibilities.

As a result of Mercer’s engagement, the Compensation Committee recommended the following changes tonon-employee director compensation: (i) a $10,000 increase in annual cash compensation, and (ii) a $15,000 increase in the value of the annual equity grants made tonon-employee directors. The Committee also recommended an increase in the annual base salary and annual equity grant for Mr. Gillman, as described elsewhere in this Proxy Statement. No other action was taken with respect to executive compensation in fiscal 2019.

We did not engage Mercer to provide any compensation consulting services in fiscal 2020. No action was taken with respect to executive compensation in fiscal 2020.

Summary Compensation Table

The following table sets forth all of the compensation awarded to, earned by or paid to our NEOs during our fiscal years 20192020 and 2018:2019:

Employment and Separation Agreements with Named Executive Officers

Jonathan G. Ornstein

We entered into an employment agreement with Mr. Ornstein on February 23, 2011, effective as of March 1, 2011, to serve as the Chairman of our Board and as our ChiefExecutive Officer, which agreement was amended first effective as of January 22, 2014, again effective as of June 1, 2016, and again on July 26, 2018, to consolidate the prior amendments. Under Mr. Ornstein’s employment agreement, as amended and restated, we may terminate Mr. Ornstein’s employment at any time with prior written notice at least one year before the intended termination date. Mr. Ornstein’s employment agreement entitles him to a base salary and an opportunity to earn a cash incentive bonus, paid on a quarterly basis based upon achievement of certain benchmarks mutually agreed upon by our Board and Mr. Ornstein. Mr. Ornstein is also entitled to receive an annual equity award pursuant to the terms of our then-existing equity incentive plan, as determined by our Board or our Compensation Committee, in its sole discretion, provided that such award shall have a grant date value of not less than $800,000 for the fiscal year ended September 30, 2016 and any fiscal year thereafter during the term of the agreement. Mr. Ornstein’s employment agreement entitles him to participate in all employee benefit plans and arrangements available to our executive officers, including flight benefits. It also contains certain confidential information covenants prohibiting Mr. Ornstein from using or disclosing any of our confidential information, other than as required in the performance of his duties as our Chairman and Chief Executive Officer, during the term of his employment and for two years thereafter.

Mr. Ornstein’s employment agreement also provides him with severance in the event his employment is terminated without Cause (as defined below) by us (or, in certain circumstances, by oursuccessor-in-interest) or if he resigns for Good Reason (as defined below). If Mr. Ornstein’s employment is terminated by us without Cause or he resigns for Good Reason he is entitled to

lawful directive of us, which refusal is not cured within 30 days following written notice from us. “Change of Control” means that (i) any person acquires more than 50% of the voting power of our then-outstanding securities; (ii) a majority of the members of our Board is replaced during any12-month period by directors whose appointment or election is not endorsed by a majority of our Board before the date of appointment or election; (iii) a tender offer or exchange offer is made where the intent of such offer is to take over control of Mesa Air Group, and such offer is consummated for the securities representing more than 50% of the combined voting power of our then-outstanding voting securities over a twelve-month period; or (iv) a reorganization, merger, consolidation, or sale or other disposition of all or substantially all of our assets. Finally, “Good Reason” means any of the following, if not cured within 20 days of our receipt of a notice of termination by Mr. Ornstein: (i) any change by us in Mr. Ornstein’s title, or any significant diminishment in Mr. Ornstein’s function, duties or responsibilities from those associated with his functions, duties or responsibilities as of January 1, 2011; (ii) any material breach of the employment agreement or any other agreement between us and Mr. Ornstein which remains uncured for a period of 10 days after Mr. Ornstein gives us notice of such breach; (iii) except with Mr. Ornstein’s prior written consent, relocation of Mr. Ornstein’s principal place of employment to a location greater than 50 miles from Phoenix, Arizona, or requiring Mr. Ornstein to provide his services outside of Maricopa County, Arizona, for more than 50% of his working days during any consecutivesix-month period; or (iv) any reduction of Mr. Ornstein’s base salary, bonus opportunity or benefits, other than under circumstances in which we have imposed cuts in salary of other officers on anacross-the-board basis (in which case the cuts to Mr. Ornstein’s compensation must not be in a greater percentage than the reduction imposed on any other officer).

Michael J. Lotz

We entered into an employment agreement with Mr. Lotz on February 23, 2011, effective as of March 1, 2011, to serve as our President and Chief Financial Officer, which agreement was amended first effective as of January 22, 2014, again effective as of June 1, 2016, and again on July 26, 2018, to consolidate the prior amendments. Under Mr. Lotz’s employment agreement, as amended and restated, we may terminate Mr. Lotz’s employment at any time with prior written notice at least one year before the intended termination date. Mr. Lotz’s employment agreement entitles him to a base salary and an opportunity to earn a cash incentive bonus paid on a quarterly basis based upon achievement of certain benchmarks mutually agreed upon by our Board and Mr. Lotz. Mr. Lotz is also entitled to receive an annual equity award pursuant to the terms of our then-existing equity incentive plan, as determined by our Board or our Compensation Committee, in its sole discretion, provided that

which the termination occurs or (ii) the highest amount of the bonuses (incentive or otherwise) paid to Mr. Lotz with respect to the three fiscal years immediately preceding the year in which his termination occurs. Upon Mr. Lotz’s termination without Cause or resignation for Good Reason, he is also entitled to the payment of continued health, dental and vision insurance premiums for himself and any covered dependents for 24 months following termination, and he is entitled to immediate vesting of any unvested equity awards.

For purposes of Mr. Lotz’s employment agreement, “Cause,” “Change of Control” and “Good Reason” have identical meanings to those contained in Mr. Ornstein’s employment agreement, as set forth above.

Brian S. Gillman

We entered into an employment agreement with Mr. Gillman on April 23, 2014, effective as of September 3, 2013, to serve as our Executive Vice President, General Counsel and Secretary, which agreement was amended effective as of June 1, 2016, and again on July 26, 2018, to consolidate the prior amendments. Under Mr. Gillman’s employment agreement, as amended and restated, we may terminate Mr. Gillman’s employment at any time with prior written notice at least one year before the intended termination date. Mr. Gillman’s employment agreement entitles him to a base salary and an opportunity to earn a cash incentive bonus paid on a quarterly basis based upon achievement of certain benchmarks identical to those in Mr. Lotz’s and Mr. Ornstein’s employment agreements. Mr. Gillman is also entitled to receive an annual equity award pursuant to the terms of our then-existing equity incentive plan, as determined by our Board or our Compensation Committee, in its sole discretion, provided that, effective July 15, 2019, such award shall have a grant date value of not less than $200,000 for any fiscal year. Mr. Gillman’s employment agreement entitles him to participate in all employee benefit plans and arrangements available to our executive officers, including the flight benefits discussed above. It also contains certain confidential information covenants prohibiting Mr. Gillman from using or disclosing any of our confidential information, other than as required in the performance of his duties as our Executive Vice President, General Counsel and Secretary, during the term of his employment and for two years thereafter.

Mr. Gillman’s employment agreement also provides him with severance in the event his employment is terminated without Cause (as defined below) by us (or, in certain circumstances, by oursuccessor-in-interest) or if he resigns for Good Reason (as defined below). If Mr. Gillman is terminated

Bradford R. Rich

Mr. Rich serves as our Chief Operating Officer. Under the terms of Mr. Rich’s offer letter, he receives an annual base salary of $300,000 and is eligible to receive an annual performance-based incentive cash bonus of up to $500,000 upon the achievement of established financial and operational goals. Mr. Rich is also eligible to receive an annual equity award under the Company’s 2018 Equity Incentive Plan, as determined by the board of directors of the Companyour Board or theour Compensation Committee, provided such award shall have a grant date value of not less than $200,000 in any fiscal year.

Mr. Rich will be eligible to participate in the Company’s 401(k)tax-deferred retirement savings plan on the same terms as the Company’s other executive officers and fulltime employees. He will be eligible for other benefits and perquisites, such as (i) medical, dental and vision insurance, (ii) life insurance, accidental death and dismemberment and business travel and accident insurance, (iii) health and dependent care flexible spending accounts, (iv) short and long-term disability insurance and (v) othernon-cash fringe benefits on the same basis as the Company’s other executive officers.

Outstanding Equity Awards as of September 30, 20192020

The following table presents information regarding all outstanding equity awards held by our NEOs as of September 30, 2019.2020. Some values in the table have not been, and may never be, realized. The restricted common stock awards are subject to forfeiture, and their value, if any, will depend on the price and the date on which each NEO set forth below sells those shares once the restriction is removed.

Equity Compensation Plan Information

The following table summarizes information about our equity compensation plans as of September 30, 2019.2020. All outstanding awards relate to our common stock.

Transactions With Related Persons in 20192020

Related Party Transaction Policy

Our Board has a written policy and procedures for review and approval of transactions involving the Company and “related persons” (which includes our directors and executive officers or their immediate family members, or shareholders and their immediate family members owning 5% or more of our common stock). The policy applies to any transaction in which the Company is a participant and any related person that has a direct or indirect material interest, excluding transactions: (a) involving payment or reimbursement of expenses of the related person incurred in the ordinary course of the related person’s service as a director or officer of the Company; (b) where the financial or compensatory arrangements are approved or ratified by our Board; (c) where the related person’s interest arises (i) only from such person’s position as a director of a corporation or organization which is a party to the transaction; (ii) only from such person’s direct or indirect ownership of less than a 10% equity interest in another person (other than a partnership, limited liability company, trust or similar entity) that is a party to the transaction; or (iii) from both such position and such ownership; (d) where the related person’s interest arises only from the ownership of a class of equity securities of the Company and all holders of that class receive the same benefits on a pro rata basis; and (e) where an immediate family member’s interest arises from his or her status as an employee of a firm, corporation or other entity for which he or she is not also an officer, director, general partner, or principal.

Our Audit Committee reviews and approves in advance all related person transactions. In determining whether to approve a related person transaction, our Audit Committee looks to whether the related person transaction is on terms and conditions no less favorable to the Company than may reasonably be expected inarm’s-length transactions with unrelated parties. Our Audit Committee will also consider such other factors as it may determine inunder the circumstances of a particular transaction.

Our Audit Committee is responsible for reviewing the material facts of all related person transactions, subject to the exceptions described above. Our Audit Committee will either approve or disapprove the entry into the related person transaction. If advance approval is not feasible, the transaction will be considered and, if our Audit Committee determines it to be appropriate, ratified at our Audit Committee’s next regularly scheduled meeting. In determining whether to approve or ratify a transaction with a related person, our Audit Committee will take into account, among other factors that it determines to be appropriate, whether the transaction is on terms no less favorable than terms generally available to an unaffiliated third party under the same or similar circumstances and the extent of the related person’s interest in the transaction. Information relating to our transactions with related persons is set forth immediately below.

Transactions With Related Persons in 20192020

The following is a summary, since the beginning of our fiscal year ended September 30, 2019,2020, of the transactions to which we have been a participant in which the amount involved, exceeded or will exceed $120,000, and in which any of our directors, executive officers or holders of more than 5% of our capital stock, or any member of the immediate family of the foregoing persons, had or will have a direct or indirect material interest.

American Capacity Purchase Agreement

As of September 30, 2019,2020, we operated 6254 CRJ-900 aircraft for American under our capacity purchase agreement with American (our “American Capacity Purchase Agreement”). In exchange for providing flight services under our American Capacity Purchase Agreement, we receive a fixed monthly minimum amount per aircraft under contract plus certain additional amounts based upon the number of flights and block hours flown during each month. In addition, we may also receive incentives

or incur penalties based upon our operational performance, including controllableon-time departures and controllable completion percentages. American also reimburses us for certain costs on an actual basis, including passenger liability and hull insurance and aircraft property taxes, all as set forth in our American Capacity Purchase Agreement. Other expenses, including fuel and certain landing fees, are directly paid to suppliers by American. In addition, American also provides, at no cost to us, certain ground handling and customer service functions, as well as airport-related facilities and gates at American hubs and cities where we operate. As ofPrior to our fiscal year ended September 30, 2019,2020, American heldsold its shares of common stock of the Company, which at the time of such sale was approximately 7.96%7% of our then issued and outstanding shares of common stock, which interest American received in exchange for its claims in our bankruptcy proceeding.stock. During our fiscal 2019,2020, we recognized approximately $376.5$276.9 million of revenue under our American Capacity Purchase Agreement.

Indemnification Agreements

Our Second Amended and Restated Articles of Incorporation compel indemnification of our directors and officers and permit indemnification of our employees and other agents, in each case to the maximum extent permitted by Nevada law, and our Second Amended and Restated Bylaws provide for indemnification of our directors, officers, employees and other agents to the maximum extent permitted by Nevada law. In addition, we have entered into indemnification agreements with our directors and NEOs containing provisions which are in some respects broader than the specific indemnification provisions contained in Nevada law. The indemnification agreements may require us, among other things, to indemnify our directors and officers against certain liabilities that may arise by reason of their status or service as directors and officers and to advance their expenses incurred as a result of any proceeding against them as to which they could be indemnified.

Delinquent Section 16(a) Reports

Section 16(a) under the Exchange Act requires our directors and executive officers, and persons who own more than ten percent of a registered class of our equity securities, to file with the SEC initial reports of ownership and reports of changes in ownership of our common stock and other equity securities. Officers, directors and greater than ten percent shareholders are required by SEC regulation to furnish us with copies of all Section 16(a) forms they file.

To our knowledge, based solely on a review of the copies of such reports furnished to us and written representations that no other reports were required, during the fiscal year ended September 30, 2019,2020, all Section 16(a) filing requirements applicable to our officers, directors and greater than 10% beneficial owners were complied with.with, except for (i) one late Form 4 report filed on July 20, 2020 for Mr. Brian S. Gillman related to one transaction and (ii) one late Form 3 filed on May 18, 2020 for Mr. Daniel J. McHugh related to one transaction.

Other Matters

As of the date of this Proxy Statement, our Board knows of no other business that will be conducted at our Annual Meeting other than as described in this Proxy Statement. If any other matter or matters are properly brought before the meeting or any adjournment or postponement of the meeting, it is the intention of the persons named in the accompanying proxy to vote the proxy on such matters in accordance with their best judgment.

We have filed our Annual Report on Form10-K for the fiscal year ended September 30, 20192020 with the SEC. It is available free of charge at the SEC’s web site at www.sec.gov. Shareholders can also access this Proxy Statement and our Annual Report on Form10-K in the “Financial Information – SEC Filings” section of our investor relations website ((http://investor.mesa-air.com)investor.mesa-air.com). We will provide, free of charge, a copy of any of our corporate documents listed above upon written request to our Executive Vice President, General Counsel and Secretary at 410 North 44th Street, Suite 700, Phoenix, Arizona 85008.

By Order of the Board of Directors

Jonathan G. Ornstein

Chairman, Chief Executive Officer and Director

Phoenix, Arizona

December 27, 20123, 2020

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MESA AIR GROUP, INC. ATTN: BRIAN S. GILLMAN 410 N. 44THSTREET-STE 700 PHOENIX, AZ 85008
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For All Withhold All For All Except
To withhold authority to vote for any individual nominee(s), mark “For All Except” and write the number(s) of the nominee(s) on the line below.
The Board of Directors recommends you vote FOR the following:
1. Election of Directors
Nominees
0101) Ellen N. Artist
02) Mitchell I. Gordon
03) Dana J. Lockhart
04) Daniel J. McHugh
05) Jonathan G. Ornstein
02 Ellen N. Artist
03 Mitchell I. Gordon
04 Dana J. Lockhart
0507) Spyridon P. Skiados
0606) Harvey W. Schiller
The Board of Directors recommends you vote FOR proposal 2:the following proposal:
For Against Abstain
2. The ratification of the appointment of Ernst & Young LLP as our independent registered public accounting firm for the fiscal year ending September 30, 2020.2021.
NOTE: Such other business as may properly come before the meeting or any adjournment thereof.
Please sign exactly as your name(s) appear(s) hereon. When signing as attorney, executor, administrator, or other fiduciary, please give full title as such. Joint owners should each sign personally. All holders must sign. If a corporation or partnership, please sign in full corporate or partnership name by authorized officer.
Signature [PLEASE SIGN WITHIN BOX]
Date
Signature (Joint Owners)
Date
0000434437_10000477727_1    R1.0.1.18

Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting: The Notice &and Proxy Statement & theand Form10-K are available at www.proxyvote.com
MESA AIR GROUP, INC.
20202021 Annual Meeting of Shareholders
February 4, 20202, 2021 2:00 PM
This proxy is solicited by the Board of Directors
The shareholder(s) hereby appoint(s) Brian S. Gillman and Michael J. Lotz, or either of them, as proxies, each with the power to appoint his substitute, and hereby authorize(s) them to represent and to vote, as designated on the reverse side of this ballot, all of the shares of common stock of MESA AIR GROUP, INC. that the shareholder(s) is/are entitled to vote at the 20202021 Annual Meeting of Shareholders to be held at 02:00 PM, MST on Tuesday, February 4, 2020,2, 2021, at the DLA Piper, LLP (US) 2525 E Camelback Rd #1000Phoenix Gateway 3, 410 N.44th Street, Suite 160, Phoenix, AZ 85016,85008, and any adjournment or postponement thereof.
This proxy, when properly executed, will be voted in the manner directed herein. If no such direction is made, this proxy will be voted in accordance with the Board of Directors’ recommendations.
0000434437_20000477727_2 R1.0.1.18
Continued and to be signed on reverse side