Document and Entity Information Statement [Table] Statement [Line Items] Statement Document Type Document Quarterly Report Document Period End Date Document Transition Report Entity File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Central Index Key Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag CONSOLIDATED BALANCE SHEETS Assets [Abstract] ASSETS Assets, Current [Abstract] CURRENT ASSETS: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Debt Securities, Available-for-sale, Current Marketable securities Marketable Securities Accounts and Other Receivables, Net, Current Receivables, net Airline Related Inventory, Net Inventories, net Other Assets, Current Other current assets Assets, Current Total current assets Property, Plant and Equipment, Net [Abstract] PROPERTY AND EQUIPMENT: Flight Equipment, Gross Aircraft and rotable spares Deposits on Flight Equipment Deposits on aircraft Carrying amount as of the balance sheet date of long-lived, physical assets used in the normal conduct of business and not intended for resale. May include land, physical structures, machinery, vehicles, furniture, computer equipment, and construction in progress. Buildings and Ground Equipment, Gross Buildings, ground equipment and other Property, Plant and Equipment, Gross Total property and equipment, gross Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less-accumulated depreciation and amortization Property, Plant and Equipment, Net Property and equipment and related assets Total property and equipment, net Other Assets, Noncurrent [Abstract] OTHER ASSETS: Operating Lease, Right-of-Use Asset Operating lease right-of-use assets The amount of long-term receivables and other assets. Long Term Receivables and Other Assets Long-term receivables and other assets Other Assets, Noncurrent Total other assets Assets Total assets Total assets Liabilities and Equity [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities, Current [Abstract] CURRENT LIABILITIES: Current maturities of long-term debt Current portion of long-term debt, net of debt issue costs Accounts Payable, Current Accounts payable and accrued liabilities Employee-related Liabilities, Current Accrued salaries, wages and benefits Operating Lease, Liability, Current Current maturities of operating lease liabilities Accrual for Taxes Other than Income Taxes, Current Taxes other than income taxes Other Liabilities, Current Other current liabilities Liabilities, Current Total current liabilities Long-term debt net of current maturities LONG-TERM DEBT, net of current maturities Long-term debt, net of current maturities and debt issue costs Deferred Tax Liabilities, Net, Noncurrent DEFERRED INCOME TAXES PAYABLE Operating Lease, Liability, Noncurrent NONCURRENT OPERATING LEASE LIABILITIES Long-term operating lease liabilities Other Liabilities, Noncurrent OTHER LONG-TERM LIABILITIES Commitments and Contingencies. COMMITMENTS AND CONTINGENCIES (Note 7) Stockholders' Equity Attributable to Parent [Abstract] STOCKHOLDERS' EQUITY: Preferred Stock, Including Additional Paid in Capital Preferred stock, 5,000,000 shares authorized; none issued Common Stocks, Including Additional Paid in Capital Common stock, no par value, 120,000,000 shares authorized; 85,373,814 and 84,270,723 shares issued as of March 31, 2026 and December 31, 2025, respectively Retained Earnings (Accumulated Deficit) Retained earnings Treasury Stock, Common, Value Treasury stock, at cost, 45,612,892 and 44,399,241 shares as of March 31, 2026 and December 31, 2025, respectively Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income (loss) Stockholders' Equity Attributable to Parent Balance Balance Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Issued Preferred stock, shares issued Common Stock, No Par Value Common stock, par value (in dollars per share) Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Treasury Stock, Common, Shares Treasury Stock, Shares, Ending Balance Treasury Stock, Shares, Beginning Balance Treasury stock, at cost, shares CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Product and Service [Axis] Product and Service [Domain] Represents flying agreements. Flying agreements Flying agreements Flying agreements revenue Represents lease, airport services and other. Lease, airport services and other Lease, airport services and other Revenues [Abstract] OPERATING REVENUES: Grant revenue Total operating revenues Operating revenues Costs and Expenses [Abstract] OPERATING EXPENSES: Labor and Related Expense Salaries, wages and benefits Aircraft maintenance, materials, and repairs Aircraft maintenance, materials and repairs Depreciation, Depletion and Amortization Depreciation and amortization Direct costs incurred at airports in which the entity conducts flight operations. The costs primarily consist of fees paid to the airport authority for takeoff and landing, gate space and facilities, allocations of common space such as security and other terminal costs and fuel storage facilities. Landing Fee And Other Rental Airport-related expenses Fuel cost incurred that are directly related to goods produced and sold and services rendered during the reporting period. Fuel Cost Aircraft fuel Other Cost and Expense, Operating Other operating expenses Cost of Goods and Services Sold Total operating expenses Operating Income (Loss) OPERATING INCOME Nonoperating Income (Expense) [Abstract] OTHER INCOME (EXPENSE): Investment Income, Interest Interest income Interest Expense Interest expense Interest expense Other Nonoperating Income (Expense) Other expense, net Nonoperating Income (Expense) Total other expense, net Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest INCOME BEFORE INCOME TAXES Income Tax Expense (Benefit) PROVISION FOR INCOME TAXES NET INCOME Net income Earnings Per Share, Basic BASIC EARNINGS PER SHARE (in dollars per share) Basic earnings per share (in dollars per share) Earnings Per Share, Diluted DILUTED EARNINGS PER SHARE (in dollars per share) Diluted earnings per share (in dollars per share) Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average common shares: Denominator: Weighted Average Number of Shares Outstanding, Basic Basic (in shares) Basic earnings per share weighted average shares Weighted Average Number of Shares Outstanding, Diluted Diluted (in shares) Diluted earnings per share weighted average shares Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] COMPREHENSIVE INCOME: OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Net unrealized depreciation on marketable securities, net of taxes Comprehensive Income (Loss), Net of Tax, Attributable to Parent TOTAL COMPREHENSIVE INCOME CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY Equity Components [Axis] Equity Component [Domain] Common Stock Retained Earnings Treasury Stock Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Loss) Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity Common Stock, Shares, Outstanding Balance (in shares) Balance (in shares) Value of shares issued during period under long-term incentive plan. Stock Issued During Period, Value, Long Term Incentive Plan Stock issued under the long-term incentive plan Number of shares issued under long-term incentive plans. Stock Issued During Period, Shares, Long Term Incentive Plan Stock issued under the long-term incentive plan (in shares) Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Employee income tax paid on vested equity awards Shares Paid for Tax Withholding for Share Based Compensation Employee income tax paid on vested equity awards (in shares) Stock Issued During Period, Value, Employee Stock Purchase Plan Sale of common stock under employee stock purchase plan Stock Issued During Period, Shares, Employee Stock Purchase Plans Sale of common stock under employee stock purchase plan (in shares) Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Stock based compensation expense Treasury Stock, Retired, Cost Method, Amount Treasury stock purchases and related excise tax Treasury Stock, Value, Acquired, Cost Method Treasury stock purchases Treasury Stock, Shares, Acquired Treasury stock purchases (in shares) Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Net unrealized depreciation on marketable securities, net of tax CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Net Cash Provided by (Used in) Operating Activities, Continuing Operations NET CASH PROVIDED BY OPERATING ACTIVITIES Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] CASH FLOWS FROM INVESTING ACTIVITIES: Payments to Acquire Debt Securities, Available-for-sale Purchases of marketable securities Proceeds from Sale of Debt Securities, Available-for-sale Sales of marketable securities Payments to Acquire Property, Plant, and Equipment [Abstract] Acquisition of property and equipment: Payments for Flight Equipment Aircraft and rotable spare parts Payments to Acquire Property, Plant, and Equipment Buildings and ground equipment The cash outflow for deposits on aircraft purchases. Payments for Deposits on Aircraft Deposits on aircraft Deposits on aircraft Proceeds from Sale of Property, Plant, and Equipment Proceeds from the sale of property and equipment The amount of increase (decrease) in other assets, net classified as investing activities by the entity for the reporting period. Increase (Decrease) In Other Assets Net, Investing Activities Decrease in other assets, net Net Cash Provided by (Used in) Investing Activities, Continuing Operations NET CASH USED IN INVESTING ACTIVITIES Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] CASH FLOWS FROM FINANCING ACTIVITIES: Proceeds from Issuance of Long-term Debt Proceeds from issuance of long-term debt Repayments of Long-term Debt Principal payments on long-term debt Payments of Debt Issuance Costs Payment of debt issuance cost Proceeds from Issuance of Common Stock Net proceeds from issuance of common stock Payments Related to Tax Withholding for Share-based Compensation Employee income tax paid on vested equity awards Payment of income tax obligation on employee equity awards The cash outflow to reacquire common stock during the period. Payments for Repurchase of Treasury Stock Purchase of treasury stock and related excise tax Net Cash Provided by (Used in) Financing Activities, Continuing Operations NET CASH USED IN FINANCING ACTIVITIES Cash and Cash Equivalents, Period Increase (Decrease) Decrease in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents CASH AND CASH EQUIVALENTS AT END OF PERIOD Cash and cash equivalents at beginning of period Supplemental Cash Flow Information [Abstract] SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION: Noncash Investing and Financing Items [Abstract] Non-cash investing and financing activities: The amount of increase (decrease) in accrued capital expenditure during the period. Change in Accrued Capital Expenditure Change in accrued capital expenditures for the period Cash Paid [Abstract] Cash paid during the period for: Interest Paid, Net Interest, net of capitalized amounts Income Taxes Paid, Net Income taxes, net of refunds Condensed Consolidated Financial Statements Basis of Presentation and Significant Accounting Policies [Text Block] Condensed Consolidated Financial Statements Operating Revenues Revenue from Contract with Customer [Text Block] Operating Revenues Capital Transactions Disclosure of pertinent details related to preferred stock authorized and the entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. Stockholders Equity Note Disclosure and Disclosure of Compensation Related Costs Share Based Payments Excluding Treasury Stock and Employee Stock Purchase Plan Disclosure [Text Block] Capital Transactions Stock Repurchase Treasury Stock [Text Block] Stock Repurchase Net Income Per Common Share Earnings Per Share [Text Block] Net Income Per Common Share Segment Reporting Segment Reporting Disclosure [Text Block] Segment Reporting Leases, Commitments, Guarantees and Contingencies Commitments and Contingencies Disclosure [Text Block] Leases, Commitments, Guarantees and Contingencies Fair Value Measurements Fair Value Disclosures [Text Block] Fair Value Measurements Long-term Debt Long-term Debt [Text Block] Long-term Debt Investments in Other Companies Equity Method Investments and Joint Ventures Disclosure [Text Block] Investments in Other Companies Income Taxes Income Tax Disclosure [Text Block] Income Taxes Legal Matters Legal Matters and Contingencies [Text Block] Legal Matters Consolidation, Policy [Policy Text Block] Basis of Presentation New Accounting Pronouncements, Policy [Policy Text Block] Recent Accounting Pronouncements Supply Commitment [Table] Represents airport customer service and other. Airport customer service and other Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Agreements with other Airlines [Line Items] Agreements with other airlines Disaggregation of Revenue [Table Text Block] Schedule of revenue by type Tabular disclosure of information relating to changes to deferred revenue and unbilled revenues. Schedule Of Deferred Revenue And Unbilled Revenue, Changes [Table Text Block] Schedule of deferred revenue and unbilled revenues Supply Commitment [Table Text Block] Schedule of aircraft and agreements with major airline partners Lessee, Operating Lease, Liability, Maturity [Table Text Block] Schedule of future minimum rental payments for operating leases Financing Receivable, Allowance for Credit Loss [Table Text Block] Schedule of allowance for credit losses Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Basic EPS and Diluted EPS Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Company's segment data The tabular disclosure of related terms and discount rates of operating leases. Schedule of Related Terms and Discount Rates Summary of related terms and discount rates Lease, Cost [Table Text Block] Summary of lease costs Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block] Summary of commitments and obligations Fair Value, Assets Measured on Recurring Basis [Table Text Block] Schedule of assets measured at fair value on a recurring basis Schedule of Long-term Debt Instruments [Table Text Block] Schedule of long-term debt Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] Carrying value and fair value of long-term debt Represents flight operations. Flight operations revenue Capacity purchase agreements flight operations revenue (non-lease component) Represents capacity purchase agreements fixed aircraft lease revenue. Capacity purchase agreements fixed aircraft lease revenue Represents capacity purchase agreements variable aircraft lease revenue. Capacity purchase agreements variable aircraft lease revenue Represents prorate agreements. Prorate agreements and SWC revenue Represents airport customer service and other revenue. Airport customer service and other revenue Represents lease, airport service and other member. Lease, airport services and other. Aircraft Type [Axis] Aircraft [Domain] CRJ 200 CRJ-550 aircraft type. C R J 550 [Member] CRJ 550 CRJ 700 CRJ 900 E175 aircraft type. E175 Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Jet aircraft and spare engines leased to third parties Legal Entity [Axis] Entity [Domain] Represents United Airlines. United Represents Delta Air Lines. Delta Represents American Airlines. American American Represents Alaska Airlines. Alaska Type of Arrangement and Non-arrangement Transactions [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Represents aircraft in schedule service or under contract. Aircraft in schedule service or under contract Represents United express agreements. United Express Agreements Represents United express prorate agreement. United Express Prorate Agreement Represents Delta connection prorate agreement. Delta Connection Prorate Agreement Represents Delta connection agreements. Delta Connection Agreements Represents American capacity purchase agreement. American Capacity Purchase Agreement Represents American capacity prorate agreement. American Prorate Agreement Represents Alaska capacity purchase agreement. Alaska Capacity Purchase Agreement Represents capacity purchase agreements. Capacity Purchase Agreements Range [Axis] Range [Domain] Minimum Maximum Balance Sheet Location [Axis] Balance Sheet Location [Domain] Other Current Assets [Member] Other current assets Other long-term assets Represents the percentage of available seat miles ("ASMs") flown under fixed-fee arrangements. Percentage of Available Seat Miles Flown Under Fixed Fee Arrangements Percentage of ASMs flown under fixed-fee arrangements Represents the essential air service contract term. Essential Air Service Contract Term EAS contract term Represents the percentage of available seat miles ("ASMs") flown under pro-rate arrangements. Percentage Of Available Seat Miles Flown Under Pro Rate Arrangements Percentage of ASMs flown under pro-rate arrangements Operating Lease, Lease Income [Abstract] Rental income under operating leases Operating Lease, Lease Income, Lease Payments Operating lease fixed revenue Operating Lease, Variable Lease Income Operating lease variable revenue Leases Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract] Operating lease payments for aircraft and facility obligations Future minimum rental income Lessor, Operating Lease, Payments to be Received, Remainder of Fiscal Year April 2026 - December 2026 Lessor, Operating Lease, Payments to be Received, Next Twelve Months 2027 Lessor, Operating Lease, Payments to be Received, Two Years 2028 Lessor, Operating Lease, Payments to be Received, Three Years 2029 Lessor, Operating Lease, Payments to be Received, Four Years 2030 Lessor, Operating Lease, Payments to be Received, Thereafter Thereafter Lessor, Operating Lease, Payments to be Received Total future minimum rental income under operating leases Contract with Customer, Liability, Revenue Recognized Deferred revenue recognized Revenue recognized that was deferred in a prior period The increase (decrease) during the reporting period of the amount of revenue for work performed for which billing has not occurred, net of uncollectible accounts. Increase (Decrease) in Unbilled Revenue Increase (decrease) in unbilled revenue Contract with Customer, Liability Deferred revenue Contract with Customer, Liability, Current Deferred revenue - other current liabilities Contract with Customer, Liability, Noncurrent Deferred revenue - other long-term liabilities Unbilled Contracts Receivable Unbilled revenue Number of Aircraft Operated Number of aircraft Number of new aircraft ordered. Number Of New Aircraft Ordered Number of new aircraft ordered Number of new aircraft deliverable in third fiscal year following the current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Number Of New Aircraft, To Be Delivered, In Year Three Number of aircraft scheduled for delivery in 2028 Number of new aircraft deliverable in next fiscal year following the current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Number Of New Aircraft To Be Delivered In Next Twelve Months Number of aircraft scheduled for delivery in 2026 Number of new aircraft deliverable in second fiscal year following the current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Number Of New Aircrafts, To Be Delivered, In Year Two Number of aircraft scheduled for delivery in 2027 Represents the number of aircraft to be purchased under the agreement. Number of Aircrafts to be Purchased Number of aircraft under purchase agreement Represents the period of agreement entered into by the entity. Terms of Agreement Agreement term Accounts Receivable, before Allowance for Credit Loss, Current Gross receivables current Accounts Receivable, before Allowance for Credit Loss, Noncurrent Gross receivables Non-current Allowance for Doubtful Accounts Receivables Balance Balance Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease). Adjustments to credit loss reserves Accounts Receivable, Allowance for Credit Loss, Writeoff Write-offs charged against allowance Nature of Operations and Summary of Significant Accounting Policies [Table] Nature of Operations and Summary of Significant Accounting Policies [Table] Represents capacity purchase agreements flight operations revenue (non-lease component). Capacity purchase agreements flight operations revenue (non-lease component) Nature of Operations and Summary of Significant Accounting Policies [Line Items] Nature of Operations and Summary of Significant Accounting Policies [Line Items] Amount of revenue recognized during the period from contracts with customers in excess of fixed payments received or receivable, comprising (a) revenue recognized from amounts previously included in contract liabilities and (b) changes in contract assets (unbilled receivables) arising from performance satisfied prior to billing. Contract With Customer, Liability, Revenue Recognized In Excess of Fixed Payments Total revenue recognized in excess of fixed monthly payments received during the period Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, net of amount not billed to customers. Contract With Customer Liability, Net Of Unbilled Receivable Net deferred revenue Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Restricted Stock Units (RSUs) Performance Share Units (PSUs) Plan Name [Axis] Plan Name [Domain] Represents the 2019 Long-Term Incentive Plan (2019 Incentive Plan), which provides for awards in the form of options to acquire shares of common stock, stock appreciation rights, restricted stock grants and performance awards. Long Term Incentive Plan 2019 Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average granted date fair value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Award percentage Number of performance period for performance stock units. Share Based Compensation Arrangement By Share Based Payment Award Number of Performance Period Number of performance periods Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period Performance period Number of equal installments for award vesting under share-based payment arrangement. Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting, Number Of Equal Installments Award vesting, number of equal installments Upon vesting, each restricted stock unit and performance share replaced with common stock. Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Replacement With Common Stock Shares Ratio Upon vesting, each restricted stock unit and performance share replaced with common stock Allocated Share-based Compensation Expense Stock based compensation expense Share Repurchase Program [Table] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Represents May 2023 stock repurchase program. May 2023 stock repurchase program Share Repurchase Program [Line Items] Stock Repurchase Stock Repurchase Program, Authorized Amount Common stock authorized for repurchase, maximum Amount of increase in the remaining authorized amount for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership. Share Repurchase Program, Increase In Remaining Authorized For Repurchase, Amount Share repurchases, increase in remaining authorized for repurchase Share Repurchase Program, Remaining Authorized, Amount Stock repurchases, amount remaining available Stock Repurchased During Period, Shares Stock repurchased (shares) Stock Repurchased During Period, Value Stock repurchased during period (value) Treasury Stock Acquired, Average Cost Per Share Weighted average price per share of common stock (in dollars per share) Excise tax recorded related to stock repurchased during the period. Stock Repurchased During Period Excise Tax Excise tax related to the stock repurchases as treasury stock Stock, Class of Stock [Table] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Class of Stock [Line Items] Net Income Per Common Share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Number of outstanding units not included in computation of Diluted EPS (in shares) Net Income (Loss) Attributable to Parent [Abstract] Numerator: Weighted Average Number of Shares, Restricted Stock Dilution due to employee equity awards Schedule of Segment Reporting Information, by Segment [Table] Segments [Axis] Segments [Domain] Represents the subsidiary of the entity, SkyWest Airlines, Inc. SkyWest Airlines SkyWest Airlines and SWC Represents the SkyWest Leasing reporting segment. SkyWest Leasing Segment Reporting Information [Line Items] Segment Reporting Number of Reportable Segments Number of reporting segments Segment Reporting, Other Segment Item, Amount Other segment expense (income) items Segment Reporting, Other Segment Item, Composition, Description Represents operating income less interest expense. Segment Profit (Loss) Segment profit Payments to Acquire Productive Assets Capital expenditures (including non-cash) Lessee, Lease, Description [Table] Represents operating leases arrangement for aircraft. Aircraft Represents operating leases arrangement for airport facilities. Airport Facilities Lessee, Lease, Description [Line Items] The number of aircraft acquired by the entity during the period. Number of Aircraft Acquired Number of aircraft acquired Lessee Operating Lease Remaining Lease Term Remaining lease term Represents the number of aircraft subleased under the agreement. Number of Aircraft Subleased Number of aircraft subleased Approximate amount of lessee's right to use underlying asset under operating lease. Operating Leases Right Of Use Assets Approximation Operating lease right-of-use assets Approximate present value of lessee's discounted obligation for lease payments from operating lease, classified as current. Current Maturities Of Operating Lease Liabilities Current maturities of lease liabilities Operating Lease, Payments Operating leases Operating Lease, Weighted Average Remaining Lease Term Weighted-average remaining lease term for operating leases Operating Lease, Weighted Average Discount Rate, Percent Weighted-average discount rate for operating leases Lease, Cost [Abstract] Lease costs Operating Lease, Cost Operating lease cost Amount of variable and short-term lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases. Variable And Short-term Lease, Cost Variable and short-term lease cost Sublease Income Sublease income Lease, Cost Total lease cost Number of aircraft to be purchased and placed into service. Number Of Aircraft To Be Purchased And Placed Into Service Number of aircraft to be purchased and placed into service Number of additional aircraft with secured delivery positions. Number of Additional Aircraft with Secured Delivery Positions Number of additional aircraft with secured delivery positions Sale Leaseback Transaction, Lease Term Lease term Purchase Obligation Purchase obligation Total Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year Apr - Dec 2026 Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months 2027 Lessee, Operating Lease, Liability, Payments, Due Year Two 2028 Lessee, Operating Lease, Liability, Payments, Due Year Three 2029 Lessee, Operating Lease, Liability, Payments, Due Year Four 2030 Amount of lessee's undiscounted obligation for lease payment for operating lease due after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Lessee Operating Lease Liability Payments Due After Year Four Thereafter Lessee, Operating Lease, Liability, Payments, Due Total minimum lease payments Purchase Obligation, Fiscal Year Maturity [Abstract] Firm aircraft and spare engine commitments Purchase Obligation, Future Minimum Payments, Remainder of Fiscal Year Apr - Dec 2026 Purchase Obligation, to be Paid, Year One 2027 Purchase Obligation, Due in Second Year 2028 Purchase Obligation, Due in Third Year 2029 Purchase Obligation, Due in Fourth Year 2030 Amount of purchase arrangement to be paid after fourth fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Purchase Obligation Due After Fourth Year Thereafter N/A Interest Commitment By Maturity [Abstract] Interest commitments Amount of interest commitment maturing in the remainder of the fiscal year following the latest fiscal year ended. Interest Commitment Future Minimum Payments Remainder Of Fiscal Year Oct - Dec 2025 Amount of interest commitment due in the next fiscal year following the latest fiscal year. Interest Commitment Due In Next Twelve Months 2026 Amount of interest commitment due in the second fiscal year following the latest fiscal year. Interest Commitment Due In Year Two 2027 Amount of interest commitment due in the third fiscal year following the latest fiscal year. Interest Commitment Due In Year Three 2028 Amount of interest commitment due in the fourth fiscal year following the latest fiscal year. Interest Commitment Due In Year Four 2029 Amount of interest commitment due after the fourth fiscal year following the latest fiscal year. Interest Commitment Due After Year Four Thereafter Amount of interest commitment due. Interest Commitment Total Long-term Debt, Fiscal Year Maturity [Abstract] Principal maturities on long-term debt Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year Apr - Dec 2026 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2027 Long-term Debt, Maturities, Repayments of Principal in Year Two 2028 Long-term Debt, Maturities, Repayments of Principal in Year Three 2029 Long-term Debt, Maturities, Repayments of Principal in Year Four 2030 Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Long Term Debt Maturities Repayments Of Principal After Year Four Thereafter Total long-term debt Total long-term debt (including current portion) Total Contractual Obligation, Fiscal Year Maturity [Abstract] Total commitments and obligations Contractual Obligation, Future Minimum Payments Due, Remainder of Fiscal Year Apr - Dec 2026 Contractual Obligation, to be Paid, Year One 2027 Contractual Obligation, Due in Second Year 2028 Contractual Obligation, Due in Third Year 2029 Contractual Obligation, Due in Fourth Year 2030 Amount of contractual obligation to be paid after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Contractual Obligation Due After Fourth Year Thereafter Contractual Obligation Total Schedule of Guarantor Obligations [Table] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Domain] Debt Underlying Asset Class [Axis] Underlying Asset Class [Domain] Represents aircraft and engines. Aircraft and engines Guarantor Obligations [Line Items] Leases, Commitments, Guarantees and Contingencies Guarantor Obligations, Maximum Exposure, Undiscounted Guaranteed amount Period of guarantee, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Guarantor Obligations, Term Period Term of guarantee obligations The percentage of guaranteed amount received as consideration. Percentage Of Guaranteed Amount Received As Consideration Guaranteed amount received as consideration, percentage Guarantor Obligations, Current Carrying Value Balance of debt under the guarantee Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Recurring Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Level 1 Level 2 Measurement Basis [Axis] Portion at Fair Value Measurement [Member] Estimate Of Fair Value Fair Value Disclosure [Member] Fair Value Financial Instrument [Axis] Major Types of Debt and Equity Securities [Domain] Bond and bond funds Bonds and bond funds Commercial paper Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value Measurements Equity Securities, FV-NI, Current Investments in Other Companies Cash and Cash Equivalents, Fair Value Disclosure Cash and Cash Equivalents Assets, Fair Value Disclosure Total Assets Measured at Fair Value Represents the maximum period for redemption of marketable securities classified as current. Available-for-sale Securities, Maximum Period for Redemption Maximum period for redemption The amount of cost of marketable securities as at the end of the reporting period. Marketable Securities, At Cost Marketable securities at cost Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Represents long-term debt obligations primarily related to the acquisition of aircraft and certain spare engines. Primarily related to acquisition of aircraft and certain spare engines Line of credit Debt Instrument [Axis] Debt Instrument, Name [Domain] Represents promissory note. Promissory note Represents unsecured debt payable to U.S. Treasury. Unsecured Debt Payable To U.S. Treasury [Member] Unsecured debt payable to U.S. Treasury Represents information pertaining to unsecured debt payable to U.S. Treasury at fixed annual interest rate. Unsecured Debt Payable To U.S. Treasury At Fixed Annual Interest Rate [Member] Unsecured debt payable to U.S. Treasury at fixed annual interest rate Represents information pertaining to unsecured debt payable to U.S. Treasury at variable interest rate. Unsecured Debt Payable To U.S. Treasury At Variable Interest Rate [Member] Unsecured debt payable to U.S. Treasury at variable interest rate Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent event Debt Instrument [Line Items] Debt Instrument [Line Items] Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. Debt Instrument Carrying Amount Current Current portion of long-term debt Debt Instrument unamortized debt issue cost, net Current Current portion of unamortized debt issue cost, net Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt, classified as noncurrent. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. Debt Instrument Carrying Amount Noncurrent Long-term debt, net of current maturities Debt Instrument unamortized debt issue cost, net Non current Long-term portion of unamortized debt issue cost, net Debt Issuance Costs, Gross Total unamortized debt issue cost, net Carrying value Long-term debt Total long-term debt, net of debt issue costs Carrying value Represents the number of aircraft delivered under the agreement. Number of Aircraft Delivered Number of aircraft delivered Represents the purchase of aircraft financed through long-term debt. Payments for Flight Equipment By Issuance Of Long Term Debt Purchase of aircraft financed through long-term debt Debt Instrument, Term Debt instrument, term Debt Instrument, Interest Rate, Stated Percentage Interest rate (as a percent) Debt Instrument, Face Amount Principal amount The total amount of the contingent obligation under letters of credit and surety bonds outstanding as of the reporting date. Letters of Credit and Surety Bond Outstanding Amount Letters of credit and surety bonds outstanding with various banks and surety institutions Line of Credit Facility, Maximum Borrowing Capacity Maximum borrowing capacity Line of Credit Facility, Amount Outstanding Amount outstanding Line of Credit Facility, Current Borrowing Capacity Current borrowing capacity Debt Instrument, Interest Rate, Effective Percentage Effective interest rate (as a percent) Debt Instrument, Basis Spread on Variable Rate Basis spread on variable rate Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Long-term Debt, Fair Value Fair value Schedule of Equity Method Investments [Table] Investment, Name [Axis] Investment, Name [Domain] Represents Aero Engines, LLC. Aero Engines, LLC. ("Aero Engines") Represents Corporate Flight Management, Inc. d/b/a Contour Airlines ("Contour"), a 14 CFR Part 135 air carrier. Contour Airlines [Member] Contour Airlines Represent Eve Holdings, Inc. Eve Holdings, Inc. ("Eve") Eve Holding, Inc Income Statement Location [Axis] Income Statement Location [Domain] Other Nonoperating Income. Other income, net Represent assets noncurrent excluding property plant and equipment. Other Assets Schedule of Equity Method Investments [Line Items] Investments in other companies Payments to acquire interest in joint venture Payments to acquire interest in joint venture Equity Method Investment, Ownership Percentage Investment ownership (as a percent) Proceeds from Equity Method Investment, Distribution, Return of Capital Distribution received from investment Equity Method Investments Investment balance in other companies Income (Loss) from Equity Method Investments Company's portion of income (loss) generated by other companies Payments to Acquire Equity Method Investments Payments to acquire equity method investment Number of board of directors seat held. Number of board of directors seats held Total number of board of directors seat held. Total Number of Board of Directors Seat Total number of board of directors seats Percentage of board of directors seat held. Percentage of Board of Directors Seat Held Percentage of board of directors seats held The Company due from Contour that is secured by aircraft and collectible within years. Aircraft Due Year Aircraft and collectible years The number of shares acquired on equity method investment. Equity Method Investment, Number of Shares Acquired Number of shares acquired Amount of loss recognized in other comprehensive income from derivative asset (liability) after deduction of derivative liability (asset), measured at fair value on recurring basis using unobservable input (level 3). Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Loss Included in Other Comprehensive Income (Loss) Unrealized losses Amount of gain (loss) included in earnings for investments classified as other. Gain (Loss) On Other Investments Other income (loss) net Effective Income Tax Rate Reconciliation, Percent Effective tax rate (as a percent) Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent U.S. federal statutory tax rate (as a percent)