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Republic Airways Holdings Inc. [Member] Republic Airways Holdings Inc. 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Units (RSUs) [Member] Entity Central Index Key Entity Central Index Key All Adjustments to Compensation All Adjustments to Compensation [Member] Business Combination [Axis] Business Combination [Axis] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] NET CASH PROVIDED BY OPERATING ACTIVITIES Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Accounts Receivable Accounts Receivable [Member] Delta Air Lines Delta Air Lines Delta Air Lines [Member] Delta Air Lines Income Statement [Abstract] SHAREHOLDERS’ EQUITY: Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report International Brotherhood of Teamsters International Brotherhood of Teamsters [Member] International Brotherhood of Teamsters Fair Value, Option, Quantitative Disclosures 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Disclosures [Table] Warrants outstanding (in shares) Class of Warrant or Right, Outstanding E170 E-170 [Member] E-170 FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Level 3 Fair Value, Inputs, Level 3 [Member] Aircraft and other purchase obligations Aircraft And Other Purchases [Member] Aircraft And Other Purchases Percentage of voting interest relinquished Republic equity relinquished Business Acquisition, Percentage Of Voting Interest Relinquished Business Acquisition, Percentage Of Voting Interest Relinquished CASH PAID FOR: Supplemental Cash Flow Information [Abstract] IEEPA Tariff Refund IEEPA Tariff Refund [Member] IEEPA Tariff Refund Merger-related items Merger Related Items [Member] Merger Related Items Price per share at fair value (in dollars per share) Share Price PEO Name PEO Name Total Lessor, Operating Lease, Payment to be Received Schedule of Executive Separation and Merger-Related Items Incurred Schedule of Unusual or Infrequent Items, or Both [Table Text Block] Number of cities Number Of Cities Passenger Service Provided To Number Of Cities Passenger Service Provided To Purchase agreement term Capacity Purchase Agreement, Term Capacity Purchase Agreement, Term Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Legal Entity [Axis] Legal Entity [Axis] Assets acquired: Business Combination, Recognized Asset Acquired, Asset [Abstract] CASH, CASH EQUIVALENTS, AND RESTRICTED CASH—Beginning of period CASH, CASH EQUIVALENTS, AND RESTRICTED CASH—End of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Subsequent Event [Table] Subsequent Event [Table] Other non-current liabilities Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent Wages and benefits Labor and Related Expense Modified and vested (in shares) Modified and vested (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Modified And Vested In Period Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Modified And Vested In Period Other Other Airlines [Member] Other Airlines Pre-delivery deposits paid Payments for Flight Equipment, Pre-Delivery Deposits Pre-Delivery Deposits Paid Customer [Domain] Customer [Domain] U.S. Treasury Warrants Warrants Policy [Policy Text Block] Warrants Policy LEASES Lessee, Operating Leases [Text Block] Long-Term Debt, Type [Domain] Long-Term Debt, Type [Domain] NET INCOME PER COMMON SHARE—BASIC (in dollars per share) Basic (in dollars per share) Earnings Per Share, Basic Measurement Input Type [Axis] Measurement Input Type [Axis] Contract liability, current Contract with Customer, Liability, Current Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Award Type Award Type [Axis] 2026 Lessor, Operating Lease, Payment to be Received, Remainder of Fiscal Year Warrants issued (in shares) Class Of Warrant Or Right, Issued Class Of Warrant Or Right, Issued Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Receivables Accounts Receivable, after Allowance for Credit Loss, Current Accumulated earnings Retained Earnings (Accumulated Deficit) Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Shares of common stock of Mesa before the application of the Three Party Agreement (in shares) Common Stock, Shares, Outstanding, Before Agreement Common Stock, Shares, Outstanding, Before Agreement Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Marketable securities Debt Securities, Available-for-Sale Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Shares issued in period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period ORGANIZATION & BUSINESS Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Cover [Abstract] Thereafter Lessor, Operating Lease, Payment To Be Received, After Year Four Lessor, Operating Lease, Payment To Be Received, After Year Four Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Concentration risk, percentage Concentration Risk, Percentage Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] 2027 Unrecorded Unconditional Purchase Obligation, to be Paid, Year One Equity Awards Adjustments Equity Awards Adjustments [Member] Schedule of Future Contractual Obligations Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block] TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity Adjusted net debt settlement Business Acquisition, Adjusted Net Debt Settlement Business Acquisition, Adjusted Net Debt Settlement Employee Stock Option Share-Based Payment Arrangement, Option [Member] Number of aircraft under commitment to purchase Number Of Aircraft Under Commitment To Purchase Number Of Aircraft Under Commitment To Purchase Schedule of Contractual Cash Receipts from Operating Leases Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Related and Nonrelated Parties [Domain] Related and Nonrelated Parties [Domain] Tabular List, Table Tabular List [Table Text Block] Vesting [Axis] Vesting [Axis] Additional paid-in capital Additional Paid in Capital Shares to be granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, To Be Granted Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, To Be Granted Other—related parties Other Operating Income (Expense), Net Name Awards Close in Time to MNPI Disclosures, Individual Name Airline Company Name [Domain] Airline Company Name [Domain] Airlines Company Name [Domain] Parts credits received from aircraft and engine manufacturers Noncash Parts Credits Received From Aircraft And Engine Manufacturers Noncash Parts Credits Received From Aircraft And Engine Manufacturers Purchases of marketable securities and investments Payments to Acquire Investments Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Schedule of Aircraft Schedule Of Aircraft Commitment [Table Text Block] Schedule Of Aircraft Commitment Number of director designated Business Combination, Number of Directors Designated To Board Business Combination, Number of Directors Designated To Board Modified and vested (in dollars per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Modified And Vested In Period, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Modified And Vested In Period, Weighted Average Grant Date Fair Value 2026 Long Term Incentive Time-Vesting RSUs Long Term Incentive Time-Vesting RSUs [Member] Long Term Incentive Time-Vesting RSUs Adjustment to Compensation: Adjustment to Compensation [Axis] Merger related costs Payments for Merger Related Costs Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest, net of capitalized amounts Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Payments for warrant redemption Payments for Repurchase of Warrants Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Total Assets, Fair Value Disclosure Long-term debt and finance leases—less current portion Long-Term Debt and Lease Obligation Implied enterprise value Business Combination, Implied Enterprise Value Business Combination, Implied Enterprise Value Spare aircraft Number Of Spare Aircraft Number Of Spare Aircraft Name Measure Name Proceeds from asset sales Merger, Proceeds From Assets Sales Merger, Proceeds From Assets Sales Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Measurement Period Adjustments, Total liabilities assumed Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Liabilities Consideration transferred Total Merger consideration Business Combination, Consideration Transferred Additional Paid-In Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Director Director [Member] Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Company Selected Measure Amount Company Selected Measure Amount Measurement Period Adjustments, Other non-current liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Liability, Noncurrent Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Liability, Noncurrent Depreciation and amortization Depreciation, Depletion and Amortization 2030 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Four Executive separation Executive Separation [Member] Executive Separation Equity securities, measurement input Equity Securities, FV-NI, Measurement Input CURRENT ASSETS: Assets, Current [Abstract] Measurement Input, Implied Volatility Measurement Input, Implied Volatility [Member] Measurement Input, Implied Volatility Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value INCOME TAX EXPENSE Income Tax Expense (Benefit) Number of aircraft leased Number Of Aircraft Leased To Partner Airlines Number Of Aircraft Leased To Partner Airlines Percentage of shares granted Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Percentage Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Percentage E175 E-175 [Member] E-175 Customer Concentration Risk Customer Concentration Risk [Member] Award Timing Method Award Timing Method [Text Block] NET CHANGES IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Total number of tranches Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other than Options, Total Number Of Tranches Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other than Options, Total Number Of Tranches 2028 Lessor, Operating Lease, Payment to be Received, Year Two Tranche Three Share-Based Payment Arrangement, Tranche Three [Member] NET INCOME Net income Net income Net Income (Loss) Attributable to Parent Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Tranche Two Share-Based Payment Arrangement, Tranche Two [Member] Restatement Determination Date: Restatement Determination Date [Axis] Liabilities assumed: Business Combination, Recognized Liability Assumed, Liability [Abstract] RSUs issued to Board of Directors (in shares) Temporary Equity, Stock Issued During Period, Shares, New Issues Temporary Equity, Stock Issued During Period, Shares, New Issues Measurement Period Adjustments, Property and equipment Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment 2026 Unrecorded Unconditional Purchase Obligation, to be Paid, Remainder of Fiscal Year Unusual or Infrequent Item, or Both [Line Items] Unusual or Infrequent Item, or Both [Line Items] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Other current assets Business Combination, Recognized Asset Acquired, Prepaid Expense and Other Asset, Current Numerator: Net Income (Loss) Available to Common Stockholders, Diluted [Abstract]