3.3.You May Vote in Person at the Meeting.Meeting. You may deliver your completed proxy card in person. Additionally, we will pass out written ballots to registered stockholders who wish to vote in person at the meeting.

Beneficial Owners.

If you hold your shares in street name, follow the voting instruction card you receive from your bank, broker or other nominee. If you want to vote in person at the annual meeting, you must obtain a legal proxy from your bank, broker or nominee and present it at the annual meeting.

Can I change my vote?

Stockholders of Record.Record. You may change your vote at any time before the proxy is exercised by voting in person at the annual meeting, giving written notice to Saia’s Secretary revoking your proxy, submitting a properly

signed proxy bearing a later date or voting again by telephone or on the internet (your latest telephone or internet vote is counted).

2

Beneficial Owners.Owners. If you hold your shares through a bank, broker or other nominee, you may change your vote by submitting new voting instructions following the instructions provided by your bank, broker or nominee.

What if I do not vote for some of the items listed on the proxy card or voting instruction card?

Stockholders of Record.Record. If you indicate a choice with respect to any matter to be acted upon on your proxy card, the shares will be voted in accordance with your instructions. Proxy cards that are signed and returned, but do not contain voting instructions with respect to a proposal, will be voted in accordance with the recommendations of the Board with respect to that proposal.

Beneficial Owners. If you indicate a choice with respect to any matter to be acted upon on your voting instruction card, the shares will be voted in accordance with your instructions. If you do not indicate a choice with respect to a proposal or do not return your voting instruction card, the bank, broker or other nominee will determine if it has the discretionary authority to vote your shares. Regulations prohibit banks, brokers and other nominees from voting shares in elections of directors, or as to compensation of Named Executive Officers, and the frequency of future advisory votes on the compensation of Named Executive Officers unless the beneficial owners indicate how the shares are to be voted. Therefore, unless you instruct your bank, broker or nominee on how to vote your shares with respect to the election of directors, the compensation of Saia’s Named Executive Officers, and the frequency of future advisory votes on the compensation of Saia’s Named Executive Officers, your bank, broker or nominee will be prohibited from voting on your behalf on any such matter for which your instructions are not provided. As such, it is critical that you cast your vote if you want it to count for the proposals regarding the aforementioned matters. Your bank, broker or nominee will, however, continue to have discretionary authority to vote uninstructed shares on the ratification of the appointment of the Company’s independent registered public accounting firm.

How many shares must be present to hold the meeting?

A quorum must be present at the annual meeting for any business to be conducted. The presence at the annual meeting, in person or by proxy, of the holders of a majority of the shares of Saia common stock outstanding on the record date will constitute a quorum. Abstentions and broker non-votes (which occur when a bank, broker or other nominee holding shares for a beneficial owner does not have discretionary voting authority with respect to a proposal and has not received instructions with respect to that proposal from the beneficial owner) will be treated as shares present for purposes of determining whether a quorum is present.

What if a quorum is not present at the meeting?

If a quorum is not present at the scheduled timestart of the meeting, the stockholders who are represented may adjourn the meeting until a quorum is present. The time and place of the adjourned meeting will be announced at the time the adjournment is taken, and so long as the adjournment is not for longer than 30 days, no other notice will be given.

How does the Board of Directors recommend I vote on the proposals?

Your Board recommends that you vote:

Will any other business be conducted at the meeting?

We know of no other business that will be presented at the meeting. If any other matter properly comes before the stockholders for a vote at the meeting, the proxy holders will vote your shares in accordance with their best judgment.

3

Who will count the votes?

Saia’s transfer agent, Computershare Trust Company, N.A., will tabulate and certify the votes. Douglas L. Col, the Company’s Treasurer and Assistant Secretary, will serve as the inspector of elections.

How many votes are required to elect the director nominees?

Because this is considered an uncontested election under the Company’s Bylaws, a nominee for director is elected to the Board if the votes cast for such nominee’s election exceed the votes cast against such nominee’s election. Abstentions will not affect the election of directors. In tabulating the voting results for the election of directors, only “FOR” and “AGAINST” votes are counted. If an incumbent director fails to receive a majority of the vote for re-election, the Nominating and Governance Committee of the Board will act on an expedited basis to determine whether to accept the director’s previously tendered irrevocable resignation and will submit such recommendation for prompt consideration by the Board. In considering whether to accept or reject the tendered resignation, the Nominating and Governance Committee and the Board will consider any factors they deem relevant in deciding whether to accept a director’s resignation.relevant. Any director who tenders his or her resignationfails to receive a majority of the vote for re-election pursuant to this provision of the Corporate Governance Guidelines will not participate in the Nominating and Governance Committee recommendation or Board consideration regarding whether or not to accept the tendered resignation.

What happens if a nominee is unable to stand for election?

If a nominee is unable to stand for election, the Board of Directors may either reduce the number of directors to be elected or select a substitute nominee. If a substitute nominee is selected, the proxy holders will vote your shares for the substitute nominee unless you have withheld authority.

How many votes are required to approve the proposals other than the director nomination proposal?

The advisory approval of the compensation of Saia’s Named Executive Officers and the ratification of the appointment of KPMG LLP as Saia’s independent registered public accounting firm each require the affirmative vote of a majority of the shares present at the meeting in person or by proxy and entitled to vote. With respect to the proposal to provide an advisory vote on the frequency of the advisory vote on executive compensation, the option that receives the greatest number of votes cast – “EVERY YEAR,” “EVERY TWO YEARS,” or “EVERY THREE YEARS” – shall constitute the shareholder’s advisory vote on the frequency of voting by stockholders on the compensation of Saia’s Named Executive Officers.

What effect will abstentions and broker non-votes have on the proposals?

Shares voting “ABSTAIN” with respect to any nominee for director or on the advisory vote on the frequency of future advisory votes on executive compensation will be excluded entirely from the vote and will have no effect on the proposal. Shares voting “ABSTAIN” on the advisory vote on executive compensation, and the ratification of the appointment of the Company’s independent registered public accounting firm will be treated as shares present for quorum purposes and entitled to vote, so they will have the same practical effect as votes against the proposals. In tabulating the voting results for any particular proposal, shares that constitute broker non-votes are not considered entitled to vote on that proposal. Thus, broker non-votes will not affect the outcome of any matter being voted on at the meeting, assuming that a quorum is obtained.

When will the Company announce the voting results?

We will announce the preliminary voting results at the annual meeting. The Company will report the final results in a Current Report on Form 8-K filed with the Securities and Exchange Commission within four business days following the annual meeting.

4

PROPOSALPROPOSAL 1

ELECTION OF DIRECTORS

The Board of Directors currently consists of nine directors divided into three classes (Class I, Class II and Class III). Directors in each class are elected to serve for three-year terms that expire in successive years. The terms of the Class III directors will expire at the upcoming annual meeting. The Board of Directors has nominated Linda J. French, William F. Martin,John P. Gainor, Jr., Randolph W. Melville and Björn E. Olsson for election as Class III directors for three-year terms expiring at the annual meeting of stockholders to be held in 20172020 and until their successors are elected and qualified. Ms. French and Messrs. Martin, Jr.Gainor, Melville and Olsson currently serve as Class III directors.

Each nominee has consented to being named in this proxy statement and has agreed to serve if elected. If a nominee is unable to stand for election, the Board of Directors may either reduce the number of directors to be elected or select a substitute nominee. If a substitute nominee is selected, the proxy holders will vote your shares for the substitute nominee, unless you have withheld authority.

Because this is considered an uncontested election under the Company’s Bylaws, a nominee for director is elected to the Board if the votes cast for such nominee’s election exceed the votes cast against such nominee’s election. Abstentions will not affect the election of directors. In tabulating the voting results for the election of directors, only “FOR” and “AGAINST” votes are counted. If an incumbent director fails to receive a majority of the vote for re-election, the Nominating and Governance Committee of the Board will act on an expedited basis to determine whether to accept the director’s previously tendered irrevocable resignation and will submit such recommendation for prompt consideration by the Board. In considering whether to accept or reject the tendered resignation, the Nominating and Governance Committee and the Board will consider any factors they deem relevant in deciding whether to accept a director’s resignation.relevant. Any director who tenders his or her resignationfails to receive a majority of the vote for re-election pursuant to this provision of the Corporate Governance Guidelines will not participate in the Nominating and Governance Committee recommendation or Board consideration regarding whether or not to accept the tendered resignation.

YOUR BOARD OF DIRECTORS RECOMMENDS THAT YOU VOTE “FOR” THE ELECTION OF EACH OF THE THREE NOMINEES.

The following tables set forth certain information regarding each nominee for director and continuing director of the Company. The information presented includes information provided to the Company by each nominee and continuing director including such person’s name, age, principal occupation and business experience for at least the past five years, the names of other publicly-held companies of which such person currently serves as a director or has served as a director during the past five years and the year in which the nominee first became a director of Saia.

The Board of Directors has determined that the following seven directors of Saia satisfyare deemed “independent” pursuant to the NASDAQ Global Select Market’s (“NASDAQ”) definition of independent director: William F. Evans, Linda J. French,John P. Gainor, Jr., John J. Holland, William F. Martin, Jr.,Randolph W. Melville, Björn E. Olsson, Douglas W. Rockel and Jeffrey C. Ward.

In addition to the information presented below regarding the specific experience, qualifications, attributes and skills of each nominee and director that led the Board of Directors to the conclusion that such person should serve as a director, the Board also believes that all of the nominees and continuing directors have a reputation for high personal and professional ethics, integrity, values and character. Each nominee and continuing director brings a strong and unique background and set of skills to the Board of Directors giving the Board as a whole competence and experience in a wide variety of areas, including corporate governance and board service, executive management, lawsales and regulation,marketing, the less-than-truckload (“LTL”) and transportation industry, accounting and finance, and risk assessment. They have demonstrated business acumen and an ability to exercise sound judgment, as well as a commitment of service to the Company and the Board. Each nominee and continuing director is committed to achieving, monitoring and improving on the Company’s business strategy.

5

Current Nominees

NOMINEES FOR ELECTION AS

CLASS III DIRECTORS FOR A THREE-YEAR

TERM EXPIRING AT THE 20172020 ANNUAL MEETING

6

Continuing Directors

CLASS I DIRECTORS CONTINUING IN OFFICE

WHOSE TERMS EXPIRE AT THE 20152018 ANNUAL MEETING

CLASS II DIRECTORS CONTINUING IN OFFICE

WHOSE TERMS EXPIRE AT THE 20162019 ANNUAL MEETING

9

CORPORATE GOVERNANCEGOVERNANCE

THE BOARD, BOARD MEETINGS AND COMMITTEES

The system of governance practices followed by the Company is memorialized in the Company’s Bylaws, in the charters of the three standing committees of the Board of Directors (the Audit Committee, the Compensation Committee and the Nominating and Governance Committee) and in the Company’s Corporate Governance Guidelines. The committee charters and Corporate Governance Guidelines are intended to provide the Board with the necessary authority and practices to review and evaluate the Company’s business and to make decisions independent of the influence of the Company’s management. The Corporate Governance Guidelines establish guidelines for the Board with respect to Board meetings, Board composition, selection and election of directors, director responsibility, director access to management and independent advisors and non-employee director compensation.

The committee charters and the Corporate Governance Guidelines are reviewed annually by the Board and updated as necessary to reflect evolving governance practices and changes in regulatory requirements. The Corporate Governance Guidelines and each of the Board’s committee charters are available free of charge on the Company’s website (www.saiacorp.com) under the investor relations section.

The Company has adopted a Code of Business Conduct and Ethics applicable to all directors, officers and employees, including its principal executive officer, principal financial officer and principal accounting officer. The Code of Business Conduct and Ethics is filed as Exhibit 14.1 to the Company’s Annual Report on Form10-K for the fiscal year ended December 31, 20132014, and incorporated by reference into the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2016, filed with the Securities and Exchange Commission.

Board Leadership Structure

Saia’s Board structure provides for a Chief Executive Officer separate from the Chairman of the Board. The Board believes having a separate Chairman and Chief Executive Officer allows each to more fully focus on their applicable responsibilities. Further, maintaining separate roles allows the Chairman to adequately oversee the Chief Executive Officer’s performance and remain more impartial when governing the Board. The Chief Executive Officer is responsible for setting the strategic direction for the Company and managing the day-to-day leadershipoperation and performance of the Company, while the Chairman provides guidance to the Chief Executive Officer, and sets the agenda for Board meetings and presides over meetings of the full Board.

Additionally, the Board has created aThe Lead Independent Director position in order to have a director in a leadership position who is “independent” under all applicable rules of the NASDAQ Global Select Market and the Securities and Exchange Commission. The Lead Independent DirectorCommission and is elected annually by the independent directors. For 2013,2016, the Lead Independent Director was Björn E. Olsson. The primary responsibilities of the Lead Independent Director are to:

In addition, the Lead Independent Director has the authority to call meetings of independent directors. If requested by major stockholders, the Lead Independent Director will make himself reasonably available for direct communication.

10

Meetings

The Board of Directors held sevenfive meetings in 2013.2016. Each director attended at least 75% of the meetings convened by the Board and the applicable committees during such director’s service on the Board during 2013.2016.

Executive sessions of non-employee directors and separate executive sessions of independent directors are held as part of each regularly scheduled meeting of the Board. The sessions of the independent directors are chaired by the Lead Independent Director.

Board Committees

The Board of Directors has an Audit Committee, a Compensation Committee and a Nominating and Governance Committee, each of which is comprised entirely of independent directors. Current Committee memberships are as follows:

Through her retirement from the Board of Directors in February 2017, Linda French was a member of the Compensation Committee.

Audit Committee

The Audit Committee has been established in accordance with Section 3(a)(58)(A) of the Securities Exchange Act of 1934, as amended (the “Securities Exchange Act of 1934”). The Audit Committee held five meetings in 2013.2016. The functions of the Audit Committee are described in the Audit Committee charter and include, among others, the following:

Each member of the Audit Committee meets the independence and experience requirements for audit committee members as established by The NASDAQ Global Select Market. The Board of Directors has determined that Mr. Evans, Mr. Holland and Mr. Rockel are “audit committee financial experts,” as defined by applicable rules of the Securities and Exchange Commission.

Compensation Committee

The Compensation Committee held sevenfive meetings in 2013.2016. The functions of the Compensation Committee are described in the Compensation Committee charter and include, among others, the following:

Each member of the Compensation Committee qualifies as (i) an independent director under applicable NASDAQ rules and Rule 10C-1 of the Securities Exchange Act of 1934; (ii) an “outside director” for purposes of Section 162(m) of the Internal Revenue Code of 1986 (the “Internal Revenue Code”), as amended; and (iii) a “non-employee director” for purposes of Rule 16b-3 of the Securities Exchange Act of 1934.

Nominating and Governance Committee

The Nominating and Governance Committee held fourtwo meetings in 2013.2016. The functions of the Nominating and Governance Committee are described in the Nominating and Governance Committee charter and include, among others, the following:

Each member of the Nominating and Governance Committee meets the definition of an independent director under applicable NASDAQ rules.

Risk Oversight

The Board of Directors oversees an enterprise-wide approach to risk management, designed to support the achievement of Company objectives, improve long-term Company performance and create stockholder value. A fundamental part of risk management is not only understanding the risks the Company faces and what steps management is taking to manage those risks, but also understanding what level of risk is appropriate for the Company. The involvement of the full Board of Directors in setting the Company’s business strategy and objectives is integral to the Board’s assessment of the Company’s risk and also a determination ofin determining what constitutes an appropriate level of risk for the Company. The full Board of Directors conducts an annual risk assessment of the Company’s financial risk, legal/compliance risk and operational/strategic risk. The Board typically reviews at least one risk element in detail at each regular Board meeting and addresses individual risk issues throughout the year as necessary.

While the Board of Directors has the ultimate oversight responsibility for the risk management process, the Board delegates responsibility for certain aspects of risk management to its committees. In particular, the Audit Committee focuses on key business and financial risks and related controls and processes. Per its charter, the Audit

Committee discusses with management the Company’s major financial reporting exposures concerning risk assessment and management and the steps management has taken to monitor and control such exposures. The Company’s Compensation Committee strives to create incentives that encourage a level of risk-taking behavior consistent with the Company’s business strategy and objectives and helps ensure that the Company’s compensation policies and practices are not reasonably likely to have a material adverse effect on the Company. The Compensation Committee structures the Company’s executive compensation program to reduce the possibility that Saia’s executive officers, either individually or as a group, make excessively risky business decisions that could maximize short-term results at the expense of long-term value.

Finally, the Company’s Nominating and Governance Committee is responsible for overseeing the Company’s major non-financial reporting enterprise risk assessment and management processes. The Chair of the Nominating and Governance Committee discusses with both the Audit Committee and the Compensation Committee the processes used in the oversight of the non-financial reporting enterprise risk assessment and management processes.

The Board believes its leadership structure enhances overall risk oversight. While the Board requires risk assessments from management, the combination of Board member experience, continuing education and independence of governance processes provide an effective basis for testing, overseeing and supplementing management assessments.