We conduct our code-share operations with our major airline partners pursuant to the following agreements:

A summary of the terms for each of our code-share agreements is provided under the heading “Code-Share Agreements” below on page 7.8.

SkyWest Leasing

SkyWest Leasing is a reportable segment whichthat includes revenue associated with our financing of new aircraft with debt under our capacity purchase agreements, currently consisting of our E175 dual-class regional jet aircraft, and the depreciation and interest expense of our E175 aircraft. The SkyWest Leasing segment additionally includes the revenue and expense from leasing aircraft and engines to third parties. The SkyWest Leasing segment’s total assets and capital expenditures include the acquired E175 aircraft, and aircraft and engines leased to third parties.

As of December 31, 2020,2021, SkyWest Leasing leased two CRJ200 aircraft, 34 CRJ700 aircraft, and five CRJ900 aircraft and regional jet aircraft engines to third parties.

ExpressJet

ExpressJet was a reportable segment prior to our sale of ExpressJet in January 2019. ExpressJet’s operations were conducted principally from airports located in Atlanta, Chicago (O’Hare), Houston, Newark and New York.

Competition and Economic Conditions

The airline industry is highly competitive. SkyWest competes principally with other regional airlines. Our operations extend throughout most major geographic markets in the United States. Our competition includes, therefore, nearly every other domestic regional airline. Our primary competitors include Air Wisconsin Airlines Corporation (“Air Wisconsin”); Endeavor Air, Inc. (“Endeavor”) (owned by Delta); Envoy Air Inc. (“Envoy”), PSA Airlines, Inc. (“PSA”) and Piedmont Airlines (“Piedmont”) (Envoy, PSA and Piedmont are owned by American); Horizon Air Industries, Inc. (“Horizon”) (owned by Alaska Air Group, Inc.); GoJet Airlines, LLC,LLC; Mesa Air Group, Inc. (“Mesa”); and Republic Airways Holdings Inc. (“Republic”). Major airlines typically award code-share flying arrangements to regional airlines based primarily upon the following criteria: ability to fly contracted schedules, availability of labor resources, including pilots, low operating cost, financial resources, geographical infrastructure, overall customer service levels relating to on-time arrival and flight completion percentages and the overall image of the regional airline. Additionally, each major airline may be limited in the number and type of regional aircraft it may use in its network due to agreements the major airline has with its own labor groups, commonly referred to in the industry as “scope limitations.” Given our major airline partners’ scope limitations, we currently do not operate a regional aircraft configured with more than 76 seats.

The principal competitive factors for regional airline code-share arrangements include labor resources, code-share agreement terms, reliable flight operations, operating cost structure, ability to finance new aircraft, certification to operate certain aircraft types and geographical infrastructure supporting markets and routes served.

Our operations represent the largest regional airline operations in the United States. However, regional carriers owned by major airlines may have access to greater resources than we do through their parent companies.

Generally, the airline industry is sensitive to changes in general economic conditions. Economic downturns, combined with competitive pressures, have contributed to a number of reorganizations, bankruptcies, liquidations and

reduce their costs. In addition, adverse weather conditions can impact our ability to complete scheduled flights and can have a negative impact on our operations and financial condition. Also, major airline scope limitations may restrict growth opportunities for the regional carriers. Additionally, attrition of our pilots or other workgroups may reduce our flying schedules and have a negative impact on our operations and financial condition.

Impact of the COVID-19 Pandemic

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COVID-19, which was declared a global health pandemic by the World Health Organization in March 2020, has continued to spread around the worldhad a significant, negative impact on our business, revenue and driven the implementation and continuation of significant, government-imposed measures to prevent or reduce its spread, including travel restrictions, closing of borders, “shelterfinancial results in place” orders and business closures. Consequently, we and our major airline partners have experienced an unprecedented decline2020 with moderate improvement in the demand for air travel, which has materially and adversely affected our revenues, particularly under our prorate arrangements (as defined below).2021. The continuedongoing spread of the virus and the ongoing global pandemic has affected nearly all ofits variants continues to negatively impact our business, and the domestic and international networks of our major airline partners for whom we conduct flight operations and rely on to set our flight schedules. WhileVarious factors outside our control may impact the lengthdemand for air travel and severityour flight schedules, such as the distribution and efficacy of vaccines, government-imposed vaccine mandates, new variants of the reductionvirus, and continued or new government travel restrictions. Additionally, indirect factors, such as employee attrition, workforce shortages and third-party labor shortages that may result in demand due to COVID-19 is uncertain, we presently expect a continued negativedelays in outsourced maintenance work and availability of aircraft parts, will likely impede the timing of our recovery from the pandemic and impact on our results of operations in 20212022 and possibly thereafter.

​thereafter, even if passenger demand returns to pre-COVID-19 levels.

In response to these developments,the COVID-19 pandemic, we have implemented measures to focus on the personal safety of our passengers and employees, while at the same time seeking to mitigate the impact on our financial position and operations. These measures include, but are not limited to, the following:

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Focus on the Personal Safety of Passengers and Employees. The safety and well-being of our passengers and employees are our priorities in every decision we make. As the COVID-19 pandemic has developed, we have taken numerous steps to help passengers and employees take appropriate safety measures on the ground and in the air in keepingworking with current Centers for Disease Control and Prevention recommendations, including:

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Capacity Reductions. Beginning in March 2020, we and our major airline partners experienced an unprecedented decrease in demand for air travel and expect this decline from pre-COVID-19 flight levels to continue throughout 2021 and possibly thereafter. We depend on our major airline partners to contract with us to operate scheduled flights. Therefore,enhance cleaning procedures for our aircraft and our training and other facilities, provide masks for crewmembers and ensuring that all fleet service personnel have the necessary personal protective equipment for disinfecting the aircraft, and encouraging vaccination for our employees through paid-time off incentives and education.

Capacity and flight schedule impact. We completed the following number of flights and related block hours in response to this decreased demand, we have significantly reduced2019, 2020 and 2021, demonstrating our capacity.

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Prior toongoing flight schedule recovery from the COVID-19 pandemic, we anticipated operating approximately 2,400 to 2,500 daily departures on average during each quarter of 2020. Due to COVID-19 related scheduled reductions, we operated approximately 2,300, 900, 1,500 and 1,700 average daily departures during the three months ended March 31, June 30, September 30 and December 31, 2020, respectively. We anticipatepandemic:

Although the number of daily scheduled flights we completed and related block hours incurred in 2021 was 89.1% and 90.1% of 2019 levels, respectively, future passenger demand in 2022 and beyond is uncertain. Additionally, a significant increase in hiring of our pilots by major airlines, low-cost carrier airlines and air freight companies may negatively impact our attrition rates and our ability to operate flight schedules requested by our major airline partners. We may not return to pre-COVID-19 levelsreceive requests by the end of 2021. We continue to work with our major airline partners, regarding future schedules and make further demand-driven adjustments to our capacity as needed.

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During 2020, we removed 55 CRJ200 regional aircraft from the SkyWest Airlines Delta Connection Agreement. These 55 aircraft had scheduled contract expirations in 2020 and were not extended due to decreased demand. We also terminated our American Prorate Agreement on seven CRJ200 aircraft in the second quarter of 2020 andor we may have further reductions in the number of CRJ200 aircraft operating under our prorate agreements with our other major airline partners. These 62 CRJ200 aircraft removed from the aforementioned Delta and American agreements were fully depreciated upon removal from service and had no outstanding financing. We may receive requests byrequest our major airline partners to defer deliveries of new or used aircraft that were previously scheduled for delivery in 20212022 and 2022.

Cost Reductions. With the reduction in revenue, we have, and may continue to implement, cost saving initiatives, including:2023.

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​Liquidity

Although future passenger demand in 2021 and beyond is currently uncertain, given the directional increases in our scheduled flight levels from April 2020 through January 2021, we believe it is an important long-term strategy to retain our pilots, flight attendants and mechanics when reasonably possible, to enhance our ability to respond to increased demand from our major airline partners in 2021. We will continue to evaluate our labor strategy in 2021.

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Liquidity. At December 31, 2020,2021, we had $1,530.4$904.0 million in total available liquidity, consisting of $825.9$860.4 million in cash and marketable securities, $39.5and $43.6 million available under SkyWest Airlines’ line of credit with a bank. Additionally, we have approximately $1.5 billion in unpledged aircraft engines and an additional $665.0 million related to the Coronavirus Aid, Relief,aircraft parts that we temporarily used as collateral in 2020 and Economic Security Act (the “CARES Act”) under our secured loan and guarantee agreement (the “Treasury Loan Agreement”) with the U.S. Department of the Treasury (“Treasury”). See Note 2 “Impact of the COVID-19 Pandemic,” to the consolidated financial statements for more information on the Treasury Loan Agreement.2021.

Industry Overview

Majors, Low-Cost Carriers and Regional Airlines

The airline industry in the United States has traditionally been comprised of several major airlines, including Alaska, American, Delta and United. The major airlines offer scheduled flights to most major U.S. cities, numerous smaller U.S. cities, and cities throughout the world through a hub and spokehub-and-spoke network.

by the major airline and surrounding cities, usually in lower-volume markets. The financial arrangements between the regional airlines and their code-share partners usually involve either capacity purchase arrangements or prorate arrangements as explained below:

Delta Connection Agreements

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United Express Agreements

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American Capacity Purchase Agreement

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Delta Connection Agreements

Alaska Capacity Purchase Agreement

Delta Connection Agreements

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We and Delta are parties to a Delta Connection Agreement (the "Delta Connection Agreement"), pursuant to which we provide contract flight services for Delta.

Alaska is scheduled to terminate in 2030. The Alaska Agreement is subject to early termination in various circumstances including:

Training and Aircraft Maintenance

SkyWest provides substantially all training to our crew members and maintenance personnel at our training facilities. Our employees perform routine airframe and engine maintenance along with periodic inspections of equipment at our maintenance facilities. We also use third-party vendors for certain airframe and engine maintenance work.

Fuel

Our capacity purchase agreements with United, Delta, United, American and Alaska require the respective major airline partner to pay for fuel costs, either directly to the fuel vendor or to reimburse us for the fuel costs we incur under those agreements, thereby reducing our exposure to fuel price fluctuations. Under our prorate agreements with DeltaUnited and United,Delta, we are responsible for the costs to operate the flights, including fuel costs, and therefore we are exposed to fuel price fluctuations for flights operated under our prorate agreements. During the year ended December 31, 2020, United, Delta and American2021, our major airlines partners purchased the majority of the fuel for our aircraft flying under their respective capacity purchase agreements directly from their fuel vendors.vendors or reimbursed us for the fuel costs we incurred under the capacity purchase agreements. Historically, we have not experienced sustained material problems with the availability of fuel and believe we will be able to obtain fuel in quantities sufficient to meet our existing and anticipated future requirements at

agreement is reached, either party may request the National Mediation Board to initiate a process including mediation, arbitration, and a potential “cooling off” period that must be followed before either party may engage in “self-help.” “Self-help” includes, among other things, a strike by the representative or the imposition of proposed changes to the collective bargaining agreement by the airline. The U.S. Congress and the President have the authority to prevent “self-help” by enacting legislation that, among other things, imposes a settlement on the parties. SkyWest Airlines respects all employees’ legal rights, including the rights to free association and collective bargaining. This includes the right to decide whether to be represented by a union. Our employees are covered by the RLA. Under the RLA, employees have the right to decide whether they wish to be represented by a union. They also have the right to reject union representation.

​Culture

At SkyWest our people are our most valued assets, and the success of our business is dependent on having an engaged and effective workforce. We respect every individual's quality of life and are committed to promoting dignity and trust in all we do. We strive to be the partner of choice and employer of choice.

Health & Safety

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Safety is the primary focus and foundation of our culture with our first guiding principle being Health and Safety First. We expect our employees to think, plan, communicate and act appropriately to prevent injury, illness or harm to themselves, fellow employees, passengers and aircraft. In response to the COVID-19 pandemic SkyWest launched various programs and initiatives to enhance the health and safety for employees, including:

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We have also implemented aSkyWest’s Safety Management System (“SMS”) that(SMS) integrates an intentional safety culture into every work group and every employee process from new hire through retirement, focusing on industry-best practices in safety competencies and behaviors. Training is required for every SkyWest employee, regardless of position.

SkyWest’s SMS is designed to identify, track, and help mitigate potential safety risks before an incident or accident occurs. Our employees receive required SMS training to stay current with all SMS resources provided by our safety department. Employees are encouraged to participate in our voluntary programs to report potential safety concerns or violations to reduce safety risk, including, but not limited to our Aviation Safety Action Program and Safety Concern Report.

professional development leads, investment in targeted advertising, social media outreach, employee referrals and relationships with community-based organizations and educational institutions.

School Partnerships and DevelopmentDevelopment.

We maintain relationships with numerous flight schools and educational institutions across the country that are focused on developing the next generation of aviation professionals. We typically recruit pilots and maintenance technicians that have completed required coursework from an accredited flight or maintenance school, respectively, and have obtained other applicable certifications. We also provide other programs to enhance our recruiting efforts towards individuals who are in process of completing their training, including a Pilot Pathway Program and aan Aviation Maintenance ApprenticeTechnician (AMT) Pathway Program.

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On-goingOngoing Training and RetentionRetention.

SkyWest invests in retaining its professionals by providing a range of talent development opportunities, including mandatory compliance training, new hire training and general professional development, as well as engaging in the training of leaders through leadership development courses. Our training programs include full-motion flight simulators for pilots, on-the-job training for technicians, and cabin trainers for flight attendants. We also reinforce our guiding principles, including but not limited to, health and safety, excellent service and quality, and respect and teamwork through our training and development programs, as well as through our employee appreciation and recognition programs.

As the larger airlines recover from the COVID-19 pandemic and look to hire pilots, we anticipate seeing a significant turnover of our pilots, specifically our captains. As we work to train and promote our first officers to captains, we will likely have higher training costs. Additionally, if our captain attrition levels exceed our upgrade replacement levels, we will likely need to reduce future flight schedules with our major airline partners, negatively impacting our revenue.

Employee Reporting

Our Code of Conduct contains general guidelines for conducting business in an ethical manner. We are committed to a working environment that is safe and supports open and honest communication. We have established a reporting system for any SkyWest employee to report a violation of company policy including harassment, discrimination, drug and alcohol use, questionable financial practice, or a breach involving safety or security. A general grievance may also be filed even if an employee has already utilized their chain of command or chooses to remain anonymous. Reports can be filed using a toll-free ethics and grievance hotline or by using on online reporting system on SkyWest’s intranet.

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Government Regulation

All interstate air carriers, including SkyWest, are subject to regulation by the U.S. Department of Transportation (the “DOT”), the U.S. Federal Aviation Administration (the “FAA”) and other governmental agencies. Regulations promulgated by the DOT primarily relate to economic aspects of air service. The FAA requires operating, air worthinessairworthiness and other certificates; approval of personnel who may engage in flight, maintenance or operating activities; record-keeping procedures in accordance with FAA requirements; and FAA approval of flight training and retraining programs. Generally, governmental agencies enforce their regulations through, among other methods, certifications, which are necessary for the continued operations of SkyWest, and proceedings, which can result in civil or criminal penalties or revocation of operating authority. The FAA can also issue maintenance directives and other mandatory orders relating to, among other things, grounding of aircraft, inspection of aircraft, installation of new safety-related items and the mandatory removal and replacement of aircraft parts.

We believe SkyWest is in compliancecomplies, in all material respects, with FAA regulations and holds all operating and airworthiness certificates and licenses which are necessary to conduct our operations. We maintain current certifications and otherwise comply with the laws, rules and regulations to which we are subject. Our flight operations, maintenance programs, recordkeeping and training programs are conducted under FAA approved procedures. All air carriers operating in the United States are required to comply with federal laws and regulations pertaining to noise abatement and

steps to improvetaxi procedures, improving the efficiency of aircraft routing, using performance-based navigation procedures to reduce track miles, and using ground power when the plane is parked at the gate. Additionally, we collaborate with aircraft and engine manufacturers and our major airline partners regarding innovations and emerging technologies that could improve fuel efficiencies and minimize environmental impact. We participate with our major airline partners in recycling programs, and we have implemented recycling initiatives in our facilities to reduce the amount of paper, plastic and other recyclables going to landfills. We have worked aggressively to reduce our reliance on paper manuals, and have converted, or are in the process of converting, our manuals and our maintenance logs into electronic form, further eliminating unnecessary waste while increasing efficiencies.

We have entered into a strategic partnership with Eve UAM, LLC (“Eve”), an Embraer company, to develop a network of deployment for Eve’s electric vertical takeoff and landing (“eVTOL”) aircraft. This partnership includes the option for SkyWest to purchase up to 100 eVTOL aircraft. Eve anticipates its four-passenger eVTOL aircraft will be certified and available for service after 2025.

Safety and Security

We are committed to the safety and security of our passengers and employees. We have taken many steps, both voluntarily and as mandated by governmental authorities, to increase the safety and security of our operations. Some of the safety and security measures we have taken with our major airline partners include: aircraft security and surveillance, aircraft cleaning procedures, positive bag matching procedures, enhanced passenger and baggage screening and search procedures, and securing of cockpit doors. We are committed to complying with future safety and security requirements.

Insurance

We maintain insurance policies we believe are of types customary in the industry and in amounts we believe are adequate to protect against material loss. These policies principally provide coverage for public liability, passenger

The COVID-19 outbreak, along with the measures governments and private organizations worldwide have implemented in an attempt to contain the spread of this pandemic, has resulted in a severe decline in demand for air travel, which has adversely affected our and our major airline partners’ business, operations and financial condition to an unprecedented extent. Measures ranging from travel restrictions, “shelter in place” and quarantine orders, limitations on public gatherings to cancellation of public events have resulted in a precipitous decline in demand for both domestic and international business and leisure travel. In response to this material decrease in demand, our major airline partners, upon whom we depend to contract with us and to set our flight schedules, have drastically reduced their capacityour flights in 2020 compared to 2019. WeAlthough our flight schedules significantly increased in turn2021 compared to 2020, we have significantly reduced our capacity. We also anticipate schedule reductions below our 2019not returned to pre-pandemic flight levels, and we cannot predict whether such levels will likely continuereturn in 20212022 and may continue thereafter. We will continue to work with our major airline partners regarding future schedules and make further demand-driven adjustments to our capacity as needed. The durationWe may experience significant fluctuations in in our future monthly flight schedules from our major airline partners in response to anticipated demand and severity ofthe ongoing recovery from the COVID-19 pandemic remain uncertain, and there can be no assurance that these actions will suffice to sustain our business and operations through this pandemic.

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During 2020 and 2021, the COVID-19 pandemic had a negative impact on our revenues. Our total revenue decreased from $2,972.0 million for the year ended December 31, 2019, to $2,127.1 million for the year ended December 31, 2020, or 28.4%. Our total and to $2,713.5 million for the year ended December 31, 2021, a decrease of 8.7% compared to the year ended December 31, 2019. Total block hours on flights we operated decreased from 1.46 million for the year ended December 31, 2019, to 0.97 million for the year ended December 31, 2020, or 33.5%. Our prorate revenue, which is derived from passenger fares on flights we operate under our prorate agreements, decreased from $521.0 and to 1.32 million for the year ended December 31, 20192021, a decrease of 9.9% compared to $268.9 million for the year ended December 31, 2020, or 48.4%. The number of aircraft operating under our prorate agreements decreased from 67 aircraft as of December 31, 2019 to 60 aircraft as of December 31, 2020, or 10.4%.2019. The negative impact to our revenues due to the COVID-19 pandemic and its associated effects on the travel industry is anticipated tomay continue into 20212022 and potentially thereafter. Due to the materially reduced flight activity during

Additionally, during 2020 SkyWest Airlines entered into a secured loan and guarantee agreement with Treasury (the “Treasury Loan Agreement”), which permitspermitted us to borrow up to $725 million under a five-year term. We have through May 28, 2021 to increase our borrowings under the Treasury Loan Agreement up to the permissible amount. As of December 31, 2020,Upon execution, we borrowed $60 million under the Treasury Loan Agreement. The Treasury Loan Agreement includes certain restrictions, including on the payment of dividends, repurchase of our common stock and executive compensation for a twelve-month period following repayment of the loan in full. The Treasury Loan Agreement is secured by certain aircraft and spare aircraft parts and is subject to periodical appraisals and loan-to-value ratios. The substance and duration of these restrictions may have materially negative affect our operations and financial results. We lose our ability to draw additionalDuring 2021, we repaid amounts under the Treasury Loan Agreement after May 28, 2021. In the event we repay the full amount outstanding under the Treasury Loan Agreement,and terminated the Treasury Loan AgreementAgreement. There is no assurance Treasury will terminate.

​provide similar financing arrangements in the future.

We may also take additional actions to improve our financial position, including measures to improve liquidity, such as drawing down on SkyWest Airlines’ line of credit, the issuance of secured debt securities, and/or the entry into other debt facilities. There can be no assurance as to the timing of any such drawdown or issuance, which may be in the near term, or that any such additional financing will be completed on favorable terms, or at all. Any such actions could be conducted in the near term, may be material in nature and could result in significant additional borrowing. Measures to improve liquidity or other strategic actions that we may take in the future in response to COVID-19 may not be effective in offsetting decreased demand, and we will not be permitted to take certain strategic actions as a result of the CARES Act and the Payroll Support Program Extension Agreement,Agreements, which could result in a material adverse effect on our business, operating results and financial condition.

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The full extent of the ongoing impact of COVID-19 on our longer-term operational and financial performance will depend on future developments, many of which are outside of our control, including the effectiveness of the mitigation strategies discussed above, the duration and spread of COVID-19 and its variants and related travel advisories and restrictions, the impact of COVID-19 on overall long-term demand for air travel, the impact of COVID-19 on our financial health and operations and that of our major airline partners, recovery plans initiated by major airlines and others in the airline industry, the impact of potential vaccine mandates on employee attrition and future governmental actions, all of which are highly uncertain and cannot be predicted. The COVID-19 pandemic has had a material impact, and the continuation of reduced demand could have a material adverse effect, on our business, operating results, financial condition and liquidity.

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In addition, a further outbreak of COVID-19 and its variants, an outbreak of another disease or similar public health threat, or fear of such an event, that affects travel demand, travel behavior or travel restrictions could have a material adverse impact on our business, financial condition and operating results and those of our major airline partners. Outbreaks of other diseases could also result in increased government restrictions and regulation, such as those actions described above or otherwise, which could adversely affect our operations.

We may experience difficulty upgrading and retaining qualified pilots.

Our operations rely on retaining qualified pilots, including captains and first officers. Our pilots may seek employment at major airlines, which generally offer higher salaries and more extensive benefit programs than regional airlines. In response to the COVID-19 pandemic, several major airlines offered their employees early retirement programs in 2020 and have publicly announced their intention to hire significant levels of pilots in the near term. As a result, we are experiencing elevated levels of pilot attrition, particularly attrition of our captains. As we work to upgrade our first officers to captain, if attrition levels exceed our upgrade and replacement levels, we likely will experience a shortage of captains, due to training time and other factors, resulting in a reduction of our flight schedules with our major airline partners. If we request our major airline partners to reduce our flight schedules due to pilot or other labor shortages, our major airline partners may seek to enforce financial penalties or reduce the compensation otherwise

The effect of any, or some combination, of the foregoing economic and industry conditions on our operations or financial condition is virtually impossible to forecast; however, the occurrence of any or all of such conditions in a significant manner could materially and adversely affect our operations and financial condition and could cause our major airline partners to reduce the utilization levels of our aircraft under our code-share agreements.

Information technology security breaches, hardware or software failures, or other information technology disruptions may negatively impact our operations or reputation.

The performance and reliability of our technology are critical to our ability to compete effectively. Any internal technological error or failure or large-scale external interruption in the technological infrastructure we depend on, such as U.S. air traffic control systems, power, telecommunications or the internet, may disrupt our internal network. Any individual failure or repeated failure of technology could impact our ability to conduct our business and result in

maintenance or operation activities; recordkeeping procedures in accordance with FAA requirements; and FAA approval of flight training and retraining programs. We cannot predict whether we will be able to comply with all present and future laws, rules, regulations and certification requirements or that the cost of continued compliance will not have a material adverse effect on our operations. We incur substantial costs in maintaining our current certifications and otherwise complying with the laws, rules and regulations to which we are subject. A decision by the FAA to ground, or require time-consuming inspections of or maintenance on, all or any of our aircraft for any reason may have a material adverse effect on our operations. In addition to state and federal regulation, airports and municipalities enact rules and regulations that affect our operations. From time to time, various airports throughout the country have considered limiting the use of smaller aircraft, such as our aircraft, at such airports. The imposition of any limits on the use of our aircraft at any airport at which we operate could have a material adverse effect on our operations.

We cannot predict the impact of potential regulatory changes that may affect our business or the airline industry as whole, including the potential impact of tariffs on aircraft deliveries. However, it is possible that these changes could adversely affect our business. Our business may be subject to additional costs or loss of government subsidies as a result of potential regulatory changes, which could have an adverse effect on our operations and financial results.

Terrorist activities or warnings have dramatically impacted the airline industry and will likely continue to do so.

The terrorist attacks of September 11, 2001 and their aftermath have negatively impacted the airline industry in general, including our operations. The primary effects experienced by the airline industry include a substantial loss of passenger traffic and revenue. If additional terrorist attacks are launched against the airline industry, there will be lasting consequences of the attacks, which may include loss of life, property damage, increased security and insurance costs, increased concerns about future terrorist attacks, increased government regulation and airport delays due to heightened security. Additional terrorist attacks and the fear of such attacks could negatively impact the airline industry, and result in further decreased passenger traffic and yields, increased flight delays or cancellations associated with new government mandates, as well as increased security, fuel and other costs. We cannot provide any assurance that these events will not harm the airline industry generally or our operations or financial condition in particular.

Risks Related to Our Code-Share Agreements Withwith Our Major Airline Partners

Our business model is dependent on code-share agreements with four major airline partners.

Our business model depends on major airlines electing to contract with us instead of operating their own regional jets. Some regional airlines are owned by a major airline. We have no guarantee that in the future our major airline partners will choose to enter into contracts with us instead of operating their own regional jets or acquiring a regional airline. Our major airline partners are not prohibited from doing so under our code-share agreements. A decision by any of our major airline partners to phase out code-share relationships and instead acquire and operate their own regional jets or regional airline could have a material adverse effect on our financial results. Additionally, our major airline partners may be limited in the number of regional aircraft they can operate in their network due to aircraft scope limitations they have with their labor groups. Scope limitations could limit our ability to increase the number of aircraft operating under our code-share agreements.

As of December 31, 2020, 3552021, 369 out of our total 452509 aircraft in scheduled service were operating under a capacity purchase arrangement or a prorate agreement with either DeltaUnited or United.Delta. If our code-share relationship with DeltaUnited or UnitedDelta were terminated, we would be significantly impacted and likely would not have an immediate source of revenue or earnings to offset such loss. A termination of either of these relationships would likely have a material adverse effect on our financial condition, operating revenues and net income unless we are able to enter into satisfactory substitute arrangements for the utilization of the affected aircraft by other code-share partners, or, alternatively, obtain the airport

Additionally, each of our agreements with our major airline partners is subject to certain early termination provisions, including uncured material performance breaches. We also currently use the systems, facilities and services of our major airline partners to support a significant portion of our operations, including airport and terminal facilities and operations, information technology support, ticketing and reservations, scheduling, dispatching, fuel purchasing and ground handling services. If our major airline partners ceasedcease to maintain any of these systems, close any of these facilities or no longer provide these services to us, due to termination of one of our code-share agreements, a strike or other labor interruption by personnel working for our major airline partners or for any other reason, we may not be able to obtain alternative systems, facilities or services on terms and conditions as favorable as those we currently receive, or at all. Since our revenues and operating profits are dependent on our level of flight operations, we could then be forced to significantly reduce our operations. Furthermore, upon certain terminations of

Our major airline partners may experience events that negatively impact their financial strength or operations, which may also negatively impact our code-share agreements,operations.

Our business model relies significantly on our major airline partners, could require us to sell or assign to them certain airport related facilities,and we use in connection withmay be negatively affected by their financial and operating strength. Events impacting airline travel, including pandemics such as COVID-19, that negatively impact the code-share services we provide. As a result, in order to offer airline service after termination of anyfinancial strength of our code-share agreements, we maymajor airline partners or have a long-term effect on the use of our major airline partners by airline travelers would likely have a material adverse effect on our business, financial condition, and results of operations. If our major airline partners experience adverse effects to replace these facilities. Wetheir operational or financial condition, they may be unable to arrangemake payments due to us under their capacity purchase agreements or may need to reduce utilization of our aircraft. Additionally, if one of our major airline partners undergoes bankruptcy, our agreement with such replacementspartner may not be assumed in bankruptcy and could be terminated. This and other events, which are outside of our control, could have a material adverse effect on satisfactory terms, or at all.our business, financial condition, and results of operations.

Our growth may be limited with our major airline partners' flight systems.

Additional growth opportunities within our major airline partners’ flight systems are limited by various factors, including a limited number of regional aircraft each such major airline partner can operate in its regional network due to its own labor agreements.agreements or scope limitations. Except as contemplated by our existing code-share agreements, we cannot be sure that our major airline partners will contract with us to fly any additional aircraft. We may not receive additional growth opportunities, or we may agree to modifications to our code-share agreements that reduce certain benefits to us in order to obtain additional aircraft, or for other reasons. Given the competitive nature of the airline industry, we believe limited growth opportunities may result in competitors accepting reduced margins and less favorable contract terms in order to secure new or additional code-share operations. Even if we are offered growth opportunities by our major airline partners, those opportunities may involve economic terms or financing commitments that are unacceptable to us. Additionally, our major airline partners may reduce the number of regional jets in their system by not renewing or extending existing flying arrangements with regional operators. Any one or more of these factors may reduce or eliminate our ability to expand our flight operations with our existing major airline partners.

There are long-term risks related to supply and demand of regional aircraft associated with our regional airline services strategy.

Various factors could change our major airline partners’ long-term strategy in using regional aircraft to support their network objectives. Such changes could result in a reduction in the number of regional aircraft our major airline partners operate in the future. If our major airline partners’ future strategies include a material reduction in regional aircraft generally or for specific aircraft types, such as 50-seat regional aircraft, the resulting decrease in demand in the aircraft we operate could have a material negative impact on our business and financial condition.

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Due, in part, to the dynamic nature of the airline industry, major airlines may also make other strategic changes such as changing or consolidating hub locations. If our major airline partners were to make changes such as these in their strategy and operations, our operations and financial results could be adversely impacted.

Disagreements regarding the interpretation of our code-share agreements with our major airline partners could have an adverse effect on our operating results and financial condition.

Long-term contractual agreements, such as our code-share agreements, are subject to interpretation and disputes may arise under such agreements if the parties to an agreement apply different interpretations to that agreement. Those disputes may divert management time and resources from the core operation of the business, and may result in litigation, arbitration or other forms of dispute resolution.

In recent years we have experienced disagreements with our major airline partners regarding the interpretation of various provisions of our code-share agreements. Some of those disagreements have resulted in litigation, and we may be subject to additional disputes and litigation in the future. To the extent that we experience disagreements regarding the interpretation of our code-share or other agreements, we will likely expend valuable management time and financial resources in our efforts to resolve those disagreements. Those disagreements may result in litigation, arbitration, settlement negotiations or other proceedings. Furthermore, there can be no assurance that any or all of those proceedings, if commenced, would be resolved in our favor. An unfavorable result in any such proceeding could have adverse financial consequences or require us to modify our operations. Such disagreements and their consequences could have an adverse effect on our operating results and financial condition.

The airline industry is highly competitive and has undergone a period of consolidation and transition leaving fewer potential code-share partners.

The airline industry is highly competitive. We compete with other regional airlines on various factors including, but not limited to, labor resources, including pilots and mechanics; low operating costs; financial resources, including the ability to finance aircraft at competitive terms; geographical infrastructure; and overall customer service levels relating to on-time arrival and flight completion percentages. Our major airline partners rely on us to fly passengers from various locations into their hubs under our code-share agreements at competitive terms. We not only compete with other regional airlines, some of which are owned by or operated as code-share partners of major airlines, but we also indirectly face competition from low-cost carriers, such as Southwest, Allegiant, Spirit, and JetBlue amongand others, who compete with our major airline partners on many routes we operate. Certain of our competitors are larger and have significantly greater financial and other resources than we do. Moreover, federal deregulation of the industry allows competitors to rapidly enter our markets and to quickly discount and restructure fares. The inability to remain competitive on the various factors valued by our major airline partners could adversely affect our operating results and financial condition.

The airline industry has undergone substantial consolidation in recent years, including the mergers between Alaska and Virgin America Inc. in 2016, American and US Airways Group Inc. in 2013, Southwest Airlines Co. and AirTran Holdings, Inc. in 2011, United and Continental Airlines, Inc. in 2010 and Delta and Northwest Airlines, Inc. in 2008. Any additional consolidation or significant alliance activity within the airline industry could limit the number of potential partners with whom we could enter into code-share relationships and could have a material adverse effect on our relationships with our major airline partners.

or sustain our business. Labor costs to recruit, incentivize and retain skilled employees may significantly increase in the future due to increased competition for the limited number of qualified industry personnel. Attrition beyond normal levelsrates that exceed our ability to hire and replace applicable workgroups could negatively impact our ability to generate revenue, negatively impact our operating results, increase our training and labor costs and our business prospects could be harmed.

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Additionally, under our capacity purchase contracts with United, Delta, United, American and Alaska, a portion of our compensation is based upon pre-determined rates typically applied to production statistics (such as departures, block hours, flight hours and number of aircraft in service each month). The primary operating costs intended to be compensated by the pre-determined rates include labor costs, including crew training costs, certain aircraft maintenance expenses, and overhead costs. During the year ended December 31, 2020,2021, approximately 89.0%91.4% of our code-share operating costs were reimbursable at pre-determined rates and 11.0%8.6% of our code-share operating costs were directly reimbursed costs, or often referred to as pass-through costs. Additionally, our aircraft maintenance costs may increase annually as our fleet ages at a higher rate than our pre-determined rates allow. Also, on an individual aircraft basis, various in-depth maintenance procedures are typically scheduled to occur at multi-year intervals, which can result in maintenance expense fluctuations year-to-year. If our operating costs for labor, aircraft maintenance and overhead costs exceed the compensation earned from our pre-determined rates under our capacity purchase arrangements, our financial position and operating results will be negatively affected.

We may experience difficulty recruiting and retaining qualified pilots and maintenance technicians.

Our operations rely on qualified personnel, including pilots, flight attendants and maintenance technicians. Our pilots, flight attendants and maintenance technicians may seek employment at mainline airlines, which generally offer higher salaries and more extensive benefit programs than regional airlines are financially able to offer. Should the turnover of employees, particularly pilots and maintenance technicians, sharply increase, we may not be able to hire sufficient pilots and maintenance technicians to replace those leaving. Additionally, FAA regulations regarding personnel certification and qualifications, and potential future changes in FAA regulations, could limit the number of qualified new entrants that we could hire.  In the event we are unable to hire and retain qualified personnel, including pilots and mechanics, our business and financial condition could be adversely affected.

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Increased labor costs, pilot and other labor availability, labor disputes and unionization of our workforces may adversely affect our ability to conduct our business and reduce our profitability.

Our business is labor intensive, requiring large numbers of pilots, flight attendants, mechanicsmaintenance technicians and other personnel. Any new collective bargaining agreements entered into by other regional carriers with their work forces may also result in higher industry wages and increased pressure on us to increase the wages and benefits of our employees. Future agreements with represented employees may be on terms that are not as attractive as our current agreements or comparable to agreements entered into by our competitors.

SkyWest’s employees are represented by in-house associations; however, organizing efforts to join national unions among those employees occur from time to time. Such efforts will likely continue in the future and may ultimately result in some or all of our employees being represented by one or more national unions. If our employees were to unionize or be deemed to be represented by one or more national unions, negotiations with these unions could divert management attention and disrupt operations, which may result in increased operating expenses and may negatively impact our financial results. Moreover, we cannot predict the outcome of any future negotiations relating to union representation or collective bargaining agreements. Agreements reached in union-involved collective bargaining may increase our operating expenses and negatively impact our financial results.

We may experience an increase in fuel prices in our prorate operations.

Dependence on foreign imports of crude oil, limited refining capacity and the possibility of changes in government policy on jet fuel production, transportation and marketing make it difficult to predict the future availability of jet fuel. If there are additional outbreaks of hostilities or other conflicts in oil-producing areas or elsewhere, or a reduction in refining capacity (due to weather events, for example), or governmental limits on the production or sale of jet fuel, there could be a reduction in the supply of jet fuel and significant increases in the cost of jet fuel. Additionally,

issues, refueling disruption, or other challenges. Major reductions in the availability of jet fuel or significant increases in its cost, or a continuation of high fuel prices for a significant period of time, would have a material adverse impact on us.

Pursuant to our capacity purchase arrangements, our major airline partners have agreed to bear the economic risk of fuel price fluctuations on our contracted flights. However, we bear the economic risk of fuel price fluctuations on our prorate operations. As of December 31, 2020,2021, we operated 3441 CRJ200s under a prorate agreement with United and 2629 CRJ200s under a prorate agreement with Delta. Our operating and financial results with respect to these prorate arrangements can be negatively affected by the price of jet fuel in the event we are unable to increase our passenger fares. Additionally, in the event of prolonged low fuel prices, our competitors may lower their passenger ticket prices on routes that compete with our prorate markets, which could negatively impact our passenger load factors.

Risks Related to Operating and Leasing Regional Jet Aircraft and Engines

We are reliant on two aircraft manufacturers and one engine manufacturer.

We operate aircraft manufactured by Bombardier and Embraer. The issuance of FAA or manufacturer directives restricting or prohibiting the use of any Bombardier or Embraer aircraft types we operate could negatively impact our business and financial results. We are also dependent upon General Electric as the sole manufacturer of engines used on the aircraft we operate. Our operations could be materially and adversely affected by the failure or inability of Bombardier, Embraer or General Electric to provide sufficient parts or related maintenance and support services to us on a timely manner. Additionally, timing and availability of new aircraft deliveries could be delayed beyond our control.

We have a significant amount of contractual long-term debt obligations.

As of December 31, 2020,2021, we had a total of approximately $3.2$3.1 billion in total long-term debt obligations. Our long-term debt obligations include $3.07$2.94 billion related to the acquisition of aircraft $105.2and $200.6 million related to borrowings under the Payroll Support Program AgreementAgreements with Treasury under the CARES Act and $60.0 million related to borrowings under the Treasury Loan Agreement.Treasury. Excluding aircraft financed by our major airline partners that we operate for them under contract, we had 4143 aircraft under long-term lease agreements as of December 31, 2020,2021, with remaining terms up to tennine years. Future minimum lease payments due under all long-term operating leases were approximately $359.7$294.3 million at December 31, 2020.2021. At a 6.1%6.0% discount factor, which is the average rate used to approximate the implicit rates within the applicable leases, the present value of these lease obligations was equal to approximately $288.6$237.2 million at December 31, 2020.2021. Our high level of fixed obligations could impact our ability to obtain additional financing to support additional expansion plans or divert cash flows from operations and expansion plans to service the fixed obligations.

Under our capacity purchase agreements, our major airline partners compensate us for our costs of owning or leasing the aircraft on a monthly basis. The aircraft compensation structure varies by agreement but is intended to cover either our aircraft principal and interest debt service costs, our aircraft depreciation and interest expense or our aircraft lease expense costs while the aircraft is under contract. In the event any of our major airline partners defaults under a capacity purchase agreement or we are unable to extend the flying contract terms on aircraft with ongoing financial obligations, our financial position and financial results could be materially adversely affected.

In addition, in response togiven the travel restrictions, decreased demand and othernegative effects the COVID-19 pandemic has had and is expectedmay continue to have on our business, including demand fluctuations, labor shortages or other effects, we may seek material amounts of additional financial liquidity in the short-term, which may include drawing down on SkyWest Airlines’ line of credit, the issuance of secured debt securities and/or the entry into other debt facilities, among other items. There can be no assurance as to the timing of any such drawdown or issuance, which may be in the near term, or that any such additional financing will be completed on favorable terms, or at all. In addition, we have received financial assistance that is available to the airline industry under the CARES Act and the 2021 Appropriations Act, which financial assistance subjects us and our business to certain restrictions, including, but not limited to, restrictions on the payment of dividends and the repurchase of our common stock, and certain limitations on executive compensation for a twelve-month period following the full repayment of borrowings under the Treasury Loan Agreement.

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If our liquidity is materially diminished, we might not be able to timely pay our leases and debts or comply with certain covenants under SkyWest Airlines’ line of credit Treasury Loan Agreement or with other material provisions of our contractual obligations.

cash early lease termination costs that would negatively impact our operations and financial condition. Additionally, in the event we are unable to extend a flying contract with an existing major airline partner, but reach an agreement to place the aircraft into service with a different major airline partner, we likely will incur inefficiencies and incremental costs, such as changing the aircraft livery, which would negatively impact our financial results.

We lease aircraft and engines to third parties and the lessee may default under the lease terms, which could negatively affect our financial condition, cash flow and results of operations.

We lease CRJleased five CRJ900 aircraft, 34 CRJ700 aircraft, and engines used on CRJ aircraft to third parties.parties as of December 31, 2021. In the event a lessee defaults under the terms of the lease agreement, we may incur additional costs, including legal and other expenses necessary to repossess the aircraft or engines, particularly if the lessee is contesting the proceedings or is in bankruptcy. We could also incur substantial maintenance, refurbishment or repair costs if a defaulting lessee fails to pay such costs and where such maintenance, refurbishment or repairs are necessary to put the aircraft or engines in suitable condition for remarketing or sale. We may also incur storage costs associated with any aircraft or engine that we repossess and are unable to place immediately with another lessee. Even if we are able to immediately place a repossessed aircraft or engine into service ourselves, or place the aircraft and engines under another lessee, we may not be able to do so at a similar or favorable lease rate. A lessee default under one of our lease agreements could negatively affect our financial condition, cash flow and results of operations.

common stock, even in circumstances where such a change in control would be viewed as desirable by most investors. The provisions of the Utah Control Shares Acquisitions Act may also discourage the acquisition of a significant interest in or control of our company. Additionally, our code-share agreements contain termination and extension trigger provisions related to change in control type transactions that may have the effect of deterring a change in control of our company.

General Risk Factors

Our business could be harmed if we lose the services of our key personnel.

Our business depends upon the efforts of our chief executive officer, Russell A. Childs, and our other key management and operating personnel. Under the terms of the Payroll Support Program 3 Agreement, we are subject to certain limitations on executive compensation through April 1, 2023. We may have difficulty replacing management or other key personnel who cease to be employed by us and, therefore, the loss of the services of any of these individuals could harm our business. We do not maintain key-person insurance on any of our executive officers.

We may be a party to litigation in the normal course of business or otherwise, which could affect our financial condition and results of operations.

We may become party to or otherwise involved in legal proceedings, claims and government inspections or investigations and other legal matters, arising in the ordinary course of our business or otherwise, including, but not limited to those related to injury or tort, environmental, employment and commercial legal issues. Legal proceedings can be complex and take many months, or even years, to reach resolution, with the final outcome depending on a number of variables, some of which are not within our control. Litigation is subject to significant uncertainty and may be expensive, time-consuming, and disruptive to our operations. Although we will vigorously defend ourselves in such legal proceedings, their ultimate resolution and potential financial and other impacts on us are uncertain. If a legal proceeding is resolved against us, it could result in significant compensatory damages or injunctive relief that could materially adversely affect our financial condition, results of operations and cash flows.

The adoption of new tax legislation or changes to existing tax laws and regulations could adversely affect our financial condition or results of operations.

The airline industry is one of the most heavily taxed industries in the United States. We are subject to tax laws and regulations of the U.S. federal, state and local governments as well as various non-U.S. jurisdictions. Potential changes in existing tax laws, including future regulatory guidance, may impact our effective tax rate and tax payments. There can be no assurance that changes in tax laws or regulations, both within the United States and the other jurisdictions in which we operate, will not materially and adversely affect our effective tax rate, tax payments, financial condition and results of operations. Similarly, changes in tax laws and regulations that impact our major airline partners, customers or the economy generally may also impact our financial condition and results of operations.

In addition, tax laws and regulations are complex and subject to varying interpretations, and any significant failure to comply with applicable tax laws and regulations in all relevant jurisdictions could give rise to substantial penalties and liabilities. Any changes in enacted tax laws, rules or regulatory or judicial interpretations; any adverse outcome in connection with tax audits in any jurisdiction; or any change in the pronouncements relating to accounting for income taxes could materially and adversely impact our effective tax rate, tax payments, financial condition and results of operations.

Information technology security breaches, hardware or software failures, or other information technology disruptions may negatively impact our operations or reputation.

The performance and reliability of our technology are critical to our ability to compete effectively. Any internal technological error or failure or large-scale external interruption in the technological infrastructure we depend on, such as U.S. air traffic control systems, power, telecommunications or the internet, may disrupt our internal network. Any individual failure or repeated failure of technology could impact our ability to conduct our business and result in increased costs. Our technological systems and related data may be vulnerable to a variety of sources of interruption due

Ground Facilities

We lease many of the buildings and associated land that we occupy. Most of these leases are for facilities at airports with various government agencies that control the use of the airport. We lease maintenance, training and office facilities in Salt Lake City, Utah, and we lease additional maintenance facilities in Boise, Idaho; Fresno, California; Tucson, Arizona; Chicago, Illinois; Detroit, Michigan; Nashville, Tennessee; South Bend, Indiana; Fort Wayne, Indiana;

Stock Performance Graph

The following Performance Graph and related information shall not be deemed “soliciting material” or “filed” with the SEC, nor shall such information be incorporated by reference into any future filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended (the “Exchange Act”), except to the extent we specifically incorporate it by reference into such filing.

The following graph compares the cumulative total shareholder return on our common stock over the five-year period ended December 31, 2020,2021, with the cumulative total return during such period of the Nasdaq Stock Market (U.S. Companies) and the Nasdaq Stock Market Transportation Index. The following graph assumes an initial investment of $100.00 with dividends reinvested. The stock performance shown on the graph below represents historical stock performance and is not necessarily indicative of future stock price performance.

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ITEM 6. SELECTED FINANCIAL DATA

The following selected financial and operating data should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” and our consolidated financial statements and related notes included elsewhere in this Report.