Operating Revenues

6 Months Ended

Jun. 30, 2025

Operating Revenues

Operating Revenues

(2) Operating Revenues

The Company recognizes revenue under its flying agreements and under its lease, airport services and other service agreements when the service is provided under the applicable agreement. Under the Company’s fixed-fee agreements (referred to as “capacity purchase” agreements) with United Airlines, Inc. (“United”), Delta Air Lines, Inc. (“Delta”), American Airlines, Inc. (“American”) and Alaska Airlines, Inc. (“Alaska”) (each, a “major airline partner”), the major airline partner generally pays the Company a fixed-fee for each departure, flight hour (measured from takeoff to landing, excluding taxi time) or block hour (measured from takeoff to landing, including taxi time) incurred, and an amount per aircraft in service each month, with additional incentives based on flight completion, on-time performance or

other performance metrics. The major airline partner also directly pays for or reimburses the Company for certain direct expenses incurred under the capacity purchase agreement, such as fuel, airport landing fees and airport rents. Under the capacity purchase agreements, the Company’s performance obligation is met when each flight is completed, measured in completed block hours, and is reflected in flying agreements revenue. The transaction price for the capacity purchase agreements is determined from the fixed-fee consideration, incentive consideration and directly reimbursed expenses earned as flights are completed over the agreement term. For the six months ended June 30, 2025 and 2024, capacity purchase agreements represented approximately 85.5% and 87.1% of the Company’s flying agreements revenue, respectively.

Under the Company’s “prorate” agreements, the major airline partner and the Company negotiate a passenger fare proration formula, pursuant to which the Company receives a percentage of the ticket revenues for those passengers traveling for one portion of their trip on a Company airline and the other portion of their trip on the major airline partner. Under the Company’s prorate agreements, the performance obligation is met and revenue is recognized when each flight is completed based upon the portion of the prorate passenger fare the Company determines that it will receive for each completed flight. The transaction price for the prorate agreements is determined from the proration formula derived from each passenger ticket amount on each completed flight over the agreement term. Certain routes under the Company’s prorate agreements are subsidized by the U.S. Department of Transportation under the Essential Air Service (“EAS”) program, a program created to ensure small communities in the United States maintain a minimum level of scheduled air service. The EAS contracts are generally between two and three years in duration and the Company recognizes EAS revenue on a per-completed-flight basis pursuant to the terms of each contract. In the event the Company receives upfront consideration for an EAS contract, the Company recognizes the revenue on a per-completed flight basis over the EAS contract term. Under the Company’s charter operations, SWC, the Company negotiates a fare for the charter flight with the customer. The performance obligation is met and revenue is recognized upon completion of the flight. For the six months ended June 30, 2025 and 2024, prorate agreements and SWC revenue represented approximately 14.5% and 12.9% of the Company’s flying agreements revenue, respectively.

The following table represents the Company’s flying agreements revenue by type for the three and six months ended June 30, 2025 and 2024 (in thousands):

	For the three months ended June 30,				For the six months ended June 30,
	2025		2024		2025		2024
Capacity purchase agreements flight operations revenue (non-lease component)	$	682,948	$	595,127	$	1,322,101	$	1,139,287
Capacity purchase agreements fixed aircraft lease revenue		104,220		75,131		215,208		150,290
Capacity purchase agreements variable aircraft lease revenue		54,898		60,841		89,937		118,727
Prorate agreements and SWC revenue		145,445		107,071		276,259		208,155
Flying agreements revenue	$	987,511	$	838,170	$	1,903,505	$	1,616,459

The Company allocates the total consideration received under its capacity purchase agreements between lease and non-lease components based on stand-alone selling prices. A portion of the Company’s compensation under its capacity purchase agreements relates to operating the aircraft, identified as the non-lease component of the capacity purchase agreement. The Company recognizes revenue attributed to the non-lease component received as fixed-fees for each departure, flight hour or block hour on an as-completed basis for each reporting period. The Company recognizes revenue attributed to the non-lease component received as fixed monthly payments per aircraft proportionate to the number of block hours completed during each reporting period, relative to the estimated number of block hours the Company anticipates completing over the remaining contract term. Accordingly, the Company’s revenue recognition will likely vary from the timing of cash receipts under the Company’s capacity purchase agreements. The Company refers to cash received under its capacity purchase agreements prior to recognizing revenue as “deferred revenue,” and the Company refers to revenue recognized prior to billing its major airline partners under its capacity purchase agreements as “unbilled revenue” for each reporting period. During the six months ended June 30, 2025, the Company recognized $21.3 million of previously deferred revenue associated with the non-lease fixed monthly payments under certain agreements and increased unbilled revenue by $5.7 million under certain other agreements, compared to

recognizing $6.0 million of previously deferred revenue and decreasing unbilled revenue by $0.6 million during the six months ended June 30, 2024.

A portion of the Company’s compensation under its capacity purchase agreements is designed to reimburse the Company for certain aircraft ownership costs. The consideration for aircraft ownership costs varies by agreement but is intended to cover either the Company’s aircraft principal and interest debt service costs, its aircraft depreciation and interest expense or its aircraft lease expense costs while the aircraft is under contract. The consideration received for the use of the aircraft under the Company’s capacity purchase agreements is accounted for as lease revenue, inasmuch as the agreements identify the “right of use” of a specific type and number of aircraft over a stated period of time. The lease revenue associated with the Company’s capacity purchase agreements is accounted for as an operating lease and is reflected as flying agreements revenue on the Company’s consolidated statements of comprehensive income. The Company recognizes fixed monthly lease payments as lease revenue using the straight-line basis over the capacity purchase agreement term and variable lease payments in the period when the block hours are completed. The Company recognized $6.0 million of previously deferred lease revenue and increased unbilled lease revenue by $2.9 million during the six months ended June 30, 2025, whereas the Company recognized $1.0 million of deferred lease revenue during the six months ended June 30, 2024, under the straight-line basis. The Company has not separately stated aircraft rental income and aircraft rental expense in the consolidated statement of comprehensive income because the use of the aircraft is not a separate activity of the total service provided under the capacity purchase agreements.

The Company’s total deferred revenue balance as of June 30, 2025 was $309.1 million, including $105.1 million in other current liabilities and $204.0 million in other long-term liabilities. The Company’s unbilled revenue balance was $22.6 million as of June 30, 2025, including $1.1 million in other current assets and $21.5 million in other long-term assets. The Company’s total deferred revenue balance was $337.5 million as of December 31, 2024, including $54.8 million in other current liabilities and $282.7 million in other long-term liabilities. The Company’s unbilled revenue balance was $15.1 million as of December 31, 2024, including $1.1 million in other current assets and $14.0 million in other long-term assets.

The Company’s capacity purchase and prorate agreements include weekly provisional cash payments from the respective major airline partner based on a projected level of flying each month. The Company and each major airline partner subsequently reconcile these payments to the actual completed flight activity on a monthly or quarterly basis.

In several of the Company’s agreements, the Company is eligible to receive incentive compensation upon the achievement of certain performance criteria. The incentives are defined in the agreements and are measured and determined on a monthly or annual basis. At the end of each period during the term of an agreement, the Company calculates the incentives achieved during that period and recognizes revenue attributable to that agreement accordingly, subject to the variable constraint guidance under ASC Topic 606.

As of June 30, 2025, the Company had 502 aircraft in scheduled service or under contract pursuant to code-share agreements. The Company’s fleet includes Embraer E175 regional jet aircraft (“E175”), Canadair CRJ900 regional jet aircraft (“CRJ900”), Canadair CRJ700 regional jet aircraft (“CRJ700”), including a 50-seat configuration of the CRJ700 aircraft, commonly referred to as a “CRJ550,” and Canadair CRJ200 regional jet aircraft (“CRJ200”). The following table summarizes the significant provisions of each code-share agreement the Company has with each major airline partner through SkyWest Airlines:

United Express Agreements
Agreement	Aircraft type	Number of Aircraft	Term / Termination Dates
United Express Agreements	• E175	116	Individual aircraft have scheduled
(capacity purchase agreements)	• CRJ700/CRJ550	33	removal dates under the agreement
	• CRJ200	50	between 2025 and 2033
United Express Prorate Agreement	• CRJ200	30*	Terminable with 120-day notice
Total under United Express Agreements		229

Delta Connection Agreements
Agreement	Aircraft type	Number of Aircraft	Term / Termination Dates
Delta Connection Agreement	• E175	87	Individual aircraft have scheduled
(capacity purchase agreement)	• CRJ900	35	removal dates under the agreement
	• CRJ700	5	between 2025 and 2034
Delta Connection Prorate Agreement	• CRJ700/CRJ550	15*	Terminable with 30-day notice
Total under Delta Connection Agreements		142
American Agreements
Agreement	Aircraft type	Number of Aircraft	Term / Termination Dates
American Agreement	• E175	20	Individual aircraft have scheduled
(capacity purchase agreement)	• CRJ700	68	removal dates under the agreement
			between 2027 and 2032
American Prorate Agreement	• CRJ900	1*	Terminable with 180-day notice
Total under American Agreements		89
Alaska Agreement
Agreement	Aircraft type	Number of Aircraft	Term / Termination Dates
Alaska Agreement	• E175	42	Individual aircraft have scheduled
(capacity purchase agreement)			removal dates under the agreement
			between 2030 and 2034

* The Company’s prorate agreements are based on specific routes, not a specific aircraft count. The number of aircraft listed above for each prorate agreement approximates the number of aircraft the Company uses to serve the prorate routes.

In addition to the contractual agreements described above, as of June 30, 2025, SkyWest Airlines reached agreements with certain major airline partners to place additional aircraft under capacity purchase agreements as summarized below. The Company is coordinating with its major airline partners to optimize the timing of upcoming fleet deliveries and the delivery timing referenced below is subject to change.

● Capacity purchase agreement with United for 13 new E175 aircraft. Five new E175 aircraft are currently scheduled for delivery in the second half of 2025 and eight new E175 aircraft are scheduled for delivery in 2026. The Company anticipates financing the aircraft through debt.

● Capacity purchase agreement with Alaska for one new E175 aircraft. The delivery date for the new E175 aircraft is currently scheduled for the second half of 2025. The Company anticipates financing the aircraft through debt.

● Capacity purchase agreement with Delta for 16 new E175 aircraft. 10 new E175 aircraft are currently scheduled for delivery in 2027 and six new E175 aircraft are scheduled for delivery in 2028. The Company anticipates financing the aircraft through debt.

● Capacity purchase agreements with United for 32 CRJ550 aircraft that are anticipated to be placed into service in 2025 through the end of 2026. Pursuant to these agreements, the Company is in the process of converting its CRJ700s to CRJ550s.

When an aircraft is scheduled for expiration from a capacity purchase agreement, the Company may, as practical under the circumstances, negotiate an extension with the respective major airline partner, negotiate the placement of the aircraft with another major airline partner, return the aircraft to the major airline partner when the

aircraft is provided by the major airline partner, place owned aircraft for sale or pursue other uses for the aircraft. Other uses for the aircraft may include placing the aircraft in a prorate agreement, leasing the aircraft to a third party or disassembling aircraft components such as the engines and parts to be used as spare inventory.

Lease, airport services and other revenues primarily consist of revenue generated from aircraft and spare engines leased to third parties, maintenance services provided to third parties and airport customer service agreements, such as gate and ramp agent services at various airports where the Company has been contracted by third parties to provide such services. The following table represents the Company’s lease, airport services and other revenues for the three and six months ended June 30, 2025 and 2024 (in thousands):

	For the three months ended June 30,				For the six months ended June 30,
	2025		2024		2025		2024
Operating lease fixed revenue	$	16,697	$	14,071	$	32,762	$	25,670
Operating lease variable revenue		8,526		8,045		15,535		13,114
Airport customer service and other revenue		22,493		6,832		31,880		15,489
Lease, airport services and other	$	47,716	$	28,948	$	80,177	$	54,273

The following table summarizes future minimum rental income under operating leases primarily related to leased aircraft and engines that had remaining non-cancelable lease terms as of June 30, 2025 (in thousands):

July 2025 through December 2025	$	23,040
2026		41,053
2027		38,697
2028		37,818
2029		36,296
Thereafter		21,218
Total future minimum rental income under operating leases	$	198,122

Of the Company’s $5.7 billion of property and equipment, net of accumulated depreciation, as of June 30, 2025, $217.7 million of regional jet aircraft and spare engines were leased to third parties under operating leases. The Company’s mitigation strategy for the residual asset risks of these assets includes leasing aircraft and engine types that can be operated by the Company in the event of a default. Additionally, the operating leases typically have specified lease return condition requirements paid by the lessee to the Company and the Company typically maintains inspection rights under the leases.

The transaction price for airport customer service agreements is determined from an agreed-upon rate by location applied to the applicable number of flights handled by the Company over the agreement term.

The Company’s operating revenues could be impacted by several factors, including changes to the Company’s code-share agreements with its major airline partners, changes in flight schedules, contract modifications resulting from contract renegotiations, the Company’s ability to earn incentive payments contemplated under the Company’s code-share agreements and settlement of reimbursement disputes with the Company’s major airline partners.

Other ancillary revenues commonly associated with airlines, such as baggage fee revenue, ticket change fee revenue and the marketing component of the sale of mileage credits, are retained by the Company’s major airline partners on flights that the Company operates under its code-share agreements.

Allowance for Credit Losses

The Company has an allowance for credit losses associated with its accounts receivable, notes receivable and third-party debt guarantees. The Company monitors publicly available credit ratings for entities for which the Company has a significant receivable balance or guarantee. As of June 30, 2025, the Company had gross receivables of $159.9 million in current assets and gross receivables of $231.8 million in other long-term assets. As of December 31, 2024, the Company had gross receivables of $125.9 million in current assets and gross receivables of $225.2 million in other long-term assets. The Company has established credit loss reserves based on publicly available historic default rates issued by

a third party for companies with similar credit ratings, factoring in the amount and term of the Company’s respective accounts receivable, notes receivable or guarantees. During the six months ended June 30, 2025, the Company increased its credit loss reserve as a result of the Company’s assessment of higher credit risk of certain outstanding receivables.

The following table summarizes the changes in allowance for credit losses (in thousands):

	Allowance for Credit Losses
Balance at December 31, 2024	$	15,071
Adjustments to credit loss reserves		10,053
Write-offs charged against allowance		(63)
Balance at June 30, 2025	$	25,061