Unrealized losses on investments, net
Unrealized Gain (Loss) on Investments
Statistical Measurement [Domain]
Statistical Measurement [Domain]
Cargo revenue
Cargo revenue
Cargo and Freight [Member]
Expected return on plan assets
Defined Benefit Plan, Expected Return (Loss) on Plan Assets
Miles earned
Frequent Flyer Mileage Miles Awarded in Period
Frequent flyer mileage miles awarded in period.
Restricted cash in Prepaid expenses and other
Restricted cash in Prepaid expenses and other
Restricted Cash, Current
Award Timing Predetermined
Award Timing Predetermined [Flag]
Republic Airways
Republic Airways Holdings Inc. [Member]
Republic Airways Holdings Inc. [Member]
Asset Class [Axis]
Asset Class [Axis]
Entity File Number
Entity File Number
Additional Capital Invested
Additional Paid-in Capital [Member]
Tabular List, Table
Tabular List [Table Text Block]
Frequent flyer deferred revenue
Contract With Customer, Liability, Current, Frequent Flyer
Contract With Customer, Liability, Current, Frequent Flyer
Number of aircrafts agreed to purchase between 2026 and 2029
Recorded Unconditional Purchase Obligation, Number Of Aircrafts, Year One Through Year Four
Recorded Unconditional Purchase Obligation, Number Of Aircrafts, Year One Through Year Four
Purchases of short-term and other investments
Payments to Acquire Short-Term Investments
Aircraft [Domain]
Aircraft [Domain]
Schedule of Carrying Values and Estimated Fair Values of Financial Instruments
Fair Value, by Balance Sheet Grouping [Table Text Block]
Aggregate principal amount of guarantee
Guarantor Obligations, Maximum Exposure, Undiscounted
Employee stock awards
Share-Based Payment Arrangement [Member]
Schedule of Commitments
Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block]
Trading Arrangements, by Individual
Trading Arrangements, by Individual [Table]
Measurement Basis [Axis]
Measurement Basis [Axis]
Earnings per share, basic (in dollars per share)
Earnings Per Share, Basic
Adjustment to Compensation:
Adjustment to Compensation [Axis]
Named Executive Officers, Footnote
Named Executive Officers, Footnote [Text Block]
SPECIAL CHARGES (CREDITS)
Business Combination, Integration, Restructuring, and Other Related Costs [Text Block]
Loans and Leases from Non-U.S. Entities
Loans And Leases From Non U S Entities [Member]
Loans And Leases From Non U.S Entities [Member]
REVENUE RECOGNITION
Revenue from Contract with Customer [Text Block]
Regional capacity purchase
Airline, Capacity Purchase Arrangements
Schedule of Stock by Class [Table]
Stock, Class of Stock [Table]
Total other comprehensive loss, net of tax
Other comprehensive loss
Other Comprehensive Income (Loss), Net of Tax
Total nonoperating special charges and unrealized losses on investments, net
Special Charges And Unrealized Losses (Gains) On Financial Instruments, Non-Operating, Before Tax
Special Charges And Losses On Financial Instruments, Nonoperating, Before Tax
Other
Defined Benefit Plan, Other Cost (Credit)
Adjustment to Compensation, Amount
Adjustment to Compensation Amount
Pension Benefits
Pension Benefits
Pension Plan [Member]
Employee Stock Option
Share-Based Payment Arrangement, Option [Member]
Award Timing MNPI Disclosure
Award Timing MNPI Disclosure [Text Block]
Antidilutive Securities [Axis]
Antidilutive Securities [Axis]
Total stockholders' equity
Balance beginning
Balance ending
Equity, Attributable to Parent
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Changes in value
OCI, before Reclassifications, Net of Tax, Attributable to Parent
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss), net of tax:
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Insider Trading Policies and Procedures [Line Items]
Common shares, authorized (in shares)
Common Stock, Shares Authorized
Total liabilities and stockholders' equity
Liabilities and Equity
Measured on a Recurring Basis
Fair Value, Recurring [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Pension and Other Postretirement Liabilities
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
LIABILITIES AND STOCKHOLDERS' EQUITY
Liabilities and Equity [Abstract]
Cover [Abstract]
Cover [Abstract]
Cash and cash equivalents
Cash and Cash Equivalents, Fair Value Disclosure
Amounts reclassified to earnings
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent
Portion at Fair Value Measurement
Portion at Fair Value Measurement [Member]
Maximum
Maximum [Member]
Accounting Policies [Abstract]
Non-PEO NEO Average Total Compensation Amount
Non-PEO NEO Average Total Compensation Amount
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Treasury Stock
Treasury Stock, Common [Member]
Aircraft fuel
Fuel Costs
Adjustment to Non-PEO NEO Compensation Footnote
Adjustment to Non-PEO NEO Compensation Footnote [Text Block]
Pay vs Performance Disclosure [Line Items]
U.S. government and agency notes
US Government Agencies Debt Securities [Member]
Compensation and Retirement Disclosure [Abstract]
Retirement Benefits [Abstract]
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Non-Rule 10b5-1 Arrangement Terminated
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Entity Shell Company
Entity Shell Company
Airline Destination [Domain]
Airline Destination [Domain]
Other
Other Liabilities, Noncurrent
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-Term Debt Instruments [Table]
Proceeds from sale of property and equipment
Proceeds from Sale of Property, Plant, and Equipment
Statement of Stockholders' Equity [Abstract]
Statement of Stockholders' Equity [Abstract]
Statement of Cash Flows [Abstract]
Statement of Cash Flows [Abstract]
Company Selected Measure Amount
Company Selected Measure Amount
Award Timing MNPI Considered
Award Timing MNPI Considered [Flag]
Total comprehensive income, net
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Name
Measure Name
Secured Debt
Secured Debt [Member]
Current maturities of operating leases
Operating Lease, Liability, Current
Class of Stock [Line Items]
Class of Stock [Line Items]
Deferred income taxes
Deferred Income Tax Liabilities, Net
Document Fiscal Period Focus
Document Fiscal Period Focus
Proceeds from issuance of debt and other financial liabilities, net of discounts and fees
Proceeds From Issuance Of Long-Term Debt, Net
Proceeds From Issuance Of Long-Term Debt, Net
Award Timing Method
Award Timing Method [Text Block]
Total operating and nonoperating special charges (credits) and unrealized losses on investments, net
Special Charges (Credits) And Losses On Financial Instruments, Operating And Nonoperating, Before Tax
Special Charges (Credits) And Losses On Financial Instruments, Operating And Nonoperating, Before Tax
Award Type
Award Type [Axis]
Carrying Amount
Total
Carrying amount
Long-Term Debt
Legal Entity [Axis]
Legal Entity [Axis]
Total assets
Assets
Investment, Name [Domain]
Investment, Name [Domain]
Trading Symbol
Trading Symbol
Landing fees and other rent
Landing Fees and Other Rentals
Stock issued for share-based awards, net of shares withheld for tax (in shares)
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture
Stock issued for settlement of warrants
Stock Issued During Period, Value, Conversion Of Convertible Securities, Net Of Adjustments To Additional Paid In Capital
Stock Issued During Period, Value, Conversion Of Convertible Securities, Net Of Adjustments To Additional Paid In Capital
Entity Address, City or Town
Entity Address, City or Town
Operating Activities:
Operating Activities:
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Non-PEO NEO Average Compensation Actually Paid Amount
Non-PEO NEO Average Compensation Actually Paid Amount
Last Three Months of 2025
Unrecorded Unconditional Purchase Obligation, to be Paid, Remainder of Fiscal Year
Compensation Actually Paid vs. Other Measure
Compensation Actually Paid vs. Other Measure [Text Block]
Entity Emerging Growth Company
Entity Emerging Growth Company
2028
Long-Term Debt, Maturity, Year Three
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Preferred Stock Purchase Rights
Stock Warrants
Warrant [Member]
Right-of-use assets acquired or modified through operating leases
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year
Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member]
Level 2
Fair Value, Inputs, Level 2 [Member]
Equity method investments
Equity Method Investments
Insider Trading Policies and Procedures Not Adopted
Insider Trading Policies and Procedures Not Adopted [Text Block]
(Gains) losses on sale of assets and other special charges
Net gains on sale of assets and other special charges
Gain (Loss) On Sale Of Other Assets And Other Miscellaneous Charges
Amount of gain (loss) on sale of other assets and other miscellaneous charges.
Common shares, outstanding (in shares)
Balance beginning (in shares)
Balance ending (in shares)
Common Stock, Shares, Outstanding
PEO
PEO [Member]
Schedule of Operating Revenue by Geographic Region
Disaggregation of Revenue [Table Text Block]
Proceeds from sale of short-term and other investments
Proceeds from Sale, Maturity and Collection of Investments
Stock issued for share-based awards, net of shares withheld for tax
Shares Issued, Value, Share-Based Payment Arrangement, After Forfeiture, Net Of Adjustments To Additional Paid In Capital
Shares Issued, Value, Share-Based Payment Arrangement, After Forfeiture, Net Of Adjustments To Additional Paid In Capital
Interest income
Investment Income, Interest
Number of employees
Entity Number of Employees
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded Unconditional Purchase Obligation [Line Items]
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]
New Surviving Entity
New Surviving Entity Between Mesa Air Group, Inc. And Republic Airways Holdings Inc. [Member]
New Merged Entity Between Mesa Air Group, Inc. And Republic Airways Holdings Inc.
Retained Earnings
Retained Earnings
Retained Earnings [Member]
Prepaid expenses and other
Prepaid Expense and Other Assets, Current
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Restatement Determination Date
Restatement Determination Date
Cash, cash equivalents and restricted cash at beginning of the period
Cash, cash equivalents and restricted cash at end of the period
Total cash, cash equivalents and restricted cash
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation
Income Statement [Abstract]
Income Statement [Abstract]
Income tax expense
Income Tax Expense (Benefit)
Changes in value
OCI, before Reclassifications, before Tax, Attributable to Parent
Short-term investments:
Investments, Fair Value Disclosure
Intangible assets, net
Intangible assets, net
Intangible Assets, Net (Excluding Goodwill)
Pension Adjustments Service Cost
Pension Adjustments Service Cost [Member]
Product and Service [Domain]
Product and Service [Domain]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Restatement does not require Recovery
Restatement Does Not Require Recovery [Text Block]
Payable to parent
Payable To Shareholders Or Affiliates For Issuance Of Capital Stock
Payable To Shareholders Or Affiliates For Issuance Of Capital Stock
Compensation Actually Paid vs. Company Selected Measure
Compensation Actually Paid vs. Company Selected Measure [Text Block]
City Area Code
City Area Code
Award Timing, How MNPI Considered
Award Timing, How MNPI Considered [Text Block]
All Trading Arrangements
All Trading Arrangements [Member]
Equity Awards Adjustments, Footnote
Equity Awards Adjustments, Footnote [Text Block]
Total Shareholder Return Vs Peer Group
Total Shareholder Return Vs Peer Group [Text Block]
Dilutive effect of stock Warrants (in shares)
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Abstract]
Schedule of Roll Forward of Frequent Flyer Deferred Revenue
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]
Investing Activities:
Investing Activities:
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Pay vs Performance Disclosure
Pay vs Performance Disclosure [Table]
Net cash provided by operating activities
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation
Investments in affiliates and other, net
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss, Noncurrent
Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis]
Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis]
Amortization of unrecognized (gain) loss
Defined Benefit Plan, Amortization of Gain (Loss)
Subsequent Event
Subsequent Event [Member]
Goodwill
Goodwill
Equity Valuation Assumption Difference, Footnote
Equity Valuation Assumption Difference, Footnote [Text Block]
PEO Total Compensation Amount
PEO Total Compensation Amount
Long-term Debt, Type [Axis]
Long-Term Debt, Type [Axis]
Equity Components [Axis]
Equity Components [Axis]
Non-Rule 10b5-1 Arrangement Adopted
Non-Rule 10b5-1 Arrangement Adopted [Flag]
BASIS OF PRESENTATION
Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block]
Other Performance Measure, Amount
Other Performance Measure, Amount
Entity Address, State or Province
Entity Address, State or Province
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Antidilutive Security, Excluded EPS Calculation [Table]
Frequent Flyer Program
Frequent Flyer Program [Member]
Frequent Flyer Program [Member]
Total current liabilities
Liabilities, Current
Domestic (U.S. and Canada)
Domestic Destination [Member]
Interest capitalized
Interest Costs Capitalized Adjustment
Aircraft maintenance materials and outside repairs
Aircraft Maintenance, Materials, and Repairs
Individual:
Individual [Axis]
Azul
Azul Linhas Aereas Brasileiras S.A. [Member]
Azul Linhas Aereas Brasileiras S.A.
Contribution to defined benefit plans
Defined Contribution Plan, Cost
Fair Value [Table]
Fair Value [Table]
Fair Value [Table]
Additional capital invested
Additional Paid in Capital, Common Stock
Entities [Table]
Entities [Table]
Frequent Flyer Deferred Revenue [Roll Forward]
Movement In Contract With Customer Liability [Roll Forward]
Movement In Contract With Customer Liability [Roll Forward]
Entity [Domain]
Entity [Domain]
Net cash used in investing activities
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation
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]
Document Fiscal Year Focus
Document Fiscal Year Focus
Basis of Presentation
Basis of Accounting, Policy [Policy Text Block]
Operating lease right-of-use assets
Operating Lease, Right-of-Use Asset
Forgone Recovery, Explanation of Impracticability
Forgone Recovery, Explanation of Impracticability [Text Block]
Payments of long-term debt, finance leases and other financial liabilities
Voluntarily prepayment of outstanding principal balance of debt
Repayments of Long-Term Debt
Effective income tax rate
Effective Income Tax Rate Reconciliation, Percent
Entity Interactive Data Current
Entity Interactive Data Current
Carrying Amount
Reported Value Measurement [Member]
Ancillary Services
Ancillary Services [Member]
Passenger - Ancillary Fees [Member]
Remaining term of debt
Debt Instrument, Remaining Term
Years remaining on debt instruments.
Equity [Abstract]
Equity [Abstract]
2028
Unrecorded Unconditional Purchase Obligation, to be Paid, Year Three
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Disaggregation of Revenue [Table]
Disaggregation of Revenue [Table]
Current maturities of long-term debt, finance leases, and other financial liabilities
Long-Term Debt and Lease Obligation, Current
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Ownership [Domain]
Ownership [Domain]
Schedule of Components of Net Periodic Benefit Cost
Schedule of Net Benefit Costs [Table Text Block]
Compensation Actually Paid vs. Total Shareholder Return
Compensation Actually Paid vs. Total Shareholder Return [Text Block]
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Comprehensive Income (Loss) Note [Text Block]
Fair Value, Recurring and Nonrecurring [Table]
Fair Value, Recurring and Nonrecurring [Table]
United Airlines, Inc.
United Air Lines Inc [Member]
United Airlines, Inc. [Member]
Balance beginning
Balance ending
AOCI before Tax, Attributable to Parent
Impact of UAL share repurchase
Stock Repurchased During Period, Value
Schedule of Components of Accumulated Other Comprehensive Income (Loss), Net of Tax
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Capital expenditures, net of flight equipment purchase deposit returns
Payments to Acquire Productive Assets
Depreciation and amortization
Depreciation, Depletion and Amortization
Entity Central Index Key
Entity Central Index Key
PEO Name
PEO Name
Schedule of Contractual Principal Payments
Schedule of Maturities of Long-Term Debt [Table Text Block]
Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year
Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Outstanding Aggregate Erroneous Compensation Amount
Outstanding Aggregate Erroneous Compensation Amount
Revolving Credit Facility
Revolving Credit Facility [Member]
Tax-Exempt Special Facilities Revenue Bonds
Tax Exempt Bonds [Member]
Tax Exempt Bonds [Member]
Schedule of Defined Benefit Plans Disclosures [Table]
Defined Benefit Plan [Table]
Arrangement Duration
Trading Arrangement Duration
Commitments and Contingencies [Table]
Commitments and Contingencies [Table]
Commitments And Contingencies [Table]
After 2029
Long-Term Debt, Maturity, After Year Four
Long-Term Debt, Maturity, After Year Four
Exercise Price
Award Exercise Price
Entity Filer Category
Entity Filer Category
Local Phone Number
Local Phone Number
Class of Stock [Domain]
Class of Stock [Domain]
Additional 402(v) Disclosure
Additional 402(v) Disclosure [Text Block]
Collaborative Arrangement and Arrangement Other than Collaborative [Domain]
Collaborative Arrangement and Arrangement Other than Collaborative [Domain]
Other, net
Payment for (Proceeds from) Other Investing Activity
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
ASSETS
Assets [Abstract]
Credit Facility [Axis]
Credit Facility [Axis]
Underlying Security Market Price Change
Underlying Security Market Price Change, Percent
Debt Instrument [Axis]
Debt Instrument [Axis]
Total operating and nonoperating special charges (credits) and unrealized losses on investments, net of income taxes
Special Charges (Credits), Net of Income Tax Benefit
Total special items in the period.
Chase and Other Partner Agreements
Chase And Other Partner Agreements [Member]
Chase And Other Partner Agreements [Member]
FAIR VALUE MEASUREMENTS, INVESTMENTS AND NOTES RECEIVABLE
Fair Value Disclosures [Text Block]
PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS
Retirement Benefits [Text Block]
Credit Facility [Domain]
Credit Facility [Domain]
Stockholders' equity:
Equity, Attributable to Parent [Abstract]
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]
Entity Address, Address Line One
Entity Address, Address Line One
Repurchases of common stock
Value of shares repurchased
Treasury Stock, Value, Acquired, Cost Method
Aircraft fuel, spare parts and supplies, net
Aircraft fuel, spare parts and supplies, net
Airline Related Inventory, Net
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent [Member]
Stated interest rate
Debt Instrument, Interest Rate, Stated Percentage
Investment, Name [Axis]
Investment, Name [Axis]
Investments [Domain]
Investments [Domain]
Long-term obligations under operating leases
Operating Lease, Liability, Noncurrent
Stock issued for settlement of warrants (in shares)
Stock Issued During Period, Shares, Conversion of Convertible Securities
Ownership [Axis]
Ownership [Axis]
Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain]
Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain]
Amortization of prior service credit
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
Special charges (credits)
Total operating special charges (credits)
Restructuring, Settlement and Impairment Provisions
Fair Value as of Grant Date
Award Grant Date Fair Value
Entity Registrant Name
Entity Registrant Name
Stock Price or TSR Estimation Method
Stock Price or TSR Estimation Method [Text Block]
Total
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Champlain Enterprises LLC
Champlain Enterprises LLC [Member]
Champlain Enterprises LLC [Member]
Salaries and related costs
Labor and Related Expense
Nonoperating debt extinguishment and modification fees
Debt Extinguishment and Modification Fees, Non-Operating
Debt Extinguishment and Modification Fees, Non-Operating
Dilutive effect of employee stock awards (in shares)
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements
Total operating expense
Costs and Expenses
Investment interests received in exchange for loans, goods and services
Other Significant Noncash Transaction, Value of Consideration Received
Document Quarterly Report
Document Quarterly Report
Deferred income tax expense
Deferred Income Taxes and Tax Credits
Fair Value
Long-Term Debt, Fair Value
Schedule of Fair Value Measurement Inputs and Valuation Techniques
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
Changed Peer Group, Footnote
Changed Peer Group, Footnote [Text Block]
Investment carrying amount
Equity Securities without Readily Determinable Fair Value, Amount
Number of operating segments
Number of Operating Segments
Pacific
Pacific Destination [Member]
Adjustment To PEO Compensation, Footnote
Adjustment To PEO Compensation, Footnote [Text Block]
Investment Type [Axis]
Investment Type [Axis]
Interest cost
Defined Benefit Plan, Interest Cost
Title
Trading Arrangement, Individual Title
Peer Group Total Shareholder Return Amount
Peer Group Total Shareholder Return Amount
Unrecorded Unconditional Purchase Obligation [Table]
Unrecorded Unconditional Purchase Obligation [Table]
Collaborative Arrangement and Arrangement Other than Collaborative [Axis]
Collaborative Arrangement and Arrangement Other than Collaborative [Axis]
Restatement Determination Date:
Restatement Determination Date [Axis]
Latin America
Latin America Destination [Member]
Non-PEO NEO
Non-PEO NEO [Member]
Accumulated Other Comprehensive Income (Loss) [Table]
Accumulated Other Comprehensive Income (Loss) [Table]
Schedule of Components of Special Charges
Restructuring and Related Costs [Table Text Block]
Other, net
Proceeds from (Payment for) Other Financing Activity
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Name
Trading Arrangement, Individual Name
All Award Types
Award Type [Domain]
Equity Awards Adjustments
Equity Awards Adjustments [Member]
Pension Benefits Adjustments, Footnote
Pension Benefits Adjustments, Footnote [Text Block]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue [Line Items]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Disclosure [Line Items]
Compensation Amount
Outstanding Recovery Compensation Amount
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Statement of Comprehensive Income [Abstract]
Statement of Comprehensive Income [Abstract]
Certificates of deposit placed through an account registry service (CDARS)
Certificates of Deposit [Member]
Recovery of Erroneously Awarded Compensation Disclosure [Line Items]
Fair Value
Estimate of Fair Value Measurement [Member]
Revenue recognized
Contract with Customer, Liability, Revenue Recognized
Retirement Plan Type [Domain]
Retirement Plan Type [Domain]
MNPI Disclosure Timed for Compensation Value
MNPI Disclosure Timed for Compensation Value [Flag]
Airline Destinations [Axis]
Airline Destination [Axis]
Name
Awards Close in Time to MNPI Disclosures, Individual Name
Equity interests exchanged for commitment to facilitate merger transaction
Equity Ownership, Excluding Consolidated Entity and Equity Method Investee, Percentage
Restricted cash in Investments in affiliates and other, net
Restricted cash in Investments in affiliates and other, net
Restricted Cash, Noncurrent
Aggregate Erroneous Compensation Not Yet Determined
Aggregate Erroneous Compensation Not Yet Determined [Text Block]
Operating revenue:
Operating revenue:
Revenues [Abstract]
Stock-settled share-based compensation
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition
Accumulated other comprehensive income
Accumulated Other Comprehensive Income (Loss), Net of Tax
Long-term debt, finance leases, and other financial liabilities
Long-Term Debt and Lease Obligation
2026
Long-Term Debt, Maturity, Year One
Changes in value
Other Comprehensive Income (Loss) before Reclassifications, Tax
Available-for-sale securities remaining maturities
Available-For-Sale Investments, Maturity Term
Available-For-Sale Investments, Maturity Term
Total noncurrent assets
Assets, Noncurrent
Undrawn and available amount under revolving credit facility
Line of Credit Facility, Remaining Borrowing Capacity
Aggregate Pension Adjustments Service Cost
Aggregate Pension Adjustments Service Cost [Member]
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV [Domain]
Number of shares purchased as a result of warrants exercised (in shares)
Class of Warrant or Right, Number of Securities Called by Warrants or Rights
Investments and Other
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Company Selected Measure Name
Company Selected Measure Name
Fair Value Measurement [Domain]
Fair Value Measurement [Domain]
Income tax benefit, net of valuation allowance
Income Tax Expense (Benefit) Special Charges
Income tax expense (benefit) special charges.
Preferred stock
Preferred Stock, Value, Issued
Aggregate Available
Trading Arrangement, Securities Aggregate Available Amount
Accounts payable
Accounts Payable, Current
Airbus A319
Airbus A319 [Member]
Airbus A319
Stock Appreciation Rights (SARs)
Stock Appreciation Rights (SARs) [Member]
All Executive Categories
All Executive Categories [Member]
Common stock at par, $0.01 par value; authorized 1,000,000,000 shares; outstanding 323,743,462 and 327,899,771 shares at September 30, 2025 and December 31, 2024, respectively
Common stock at par, $0.01 par value; authorized 1,000 shares; issued and outstanding 1,000 shares at both September 30, 2025 and December 31, 2024
Common Stock, Value, Issued
Short-term investments
Short-Term Investments
COMMITMENTS, CONTINGENCIES, AND GUARANTEES
Commitments and Contingencies Disclosure [Text Block]
Diluted weighted-average shares outstanding (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Commitments and contingencies
Commitments and Contingencies
Non-GAAP Measure Description
Non-GAAP Measure Description [Text Block]
Nonoperating unrealized losses on investments, net
Gain (Loss) On Financial Instruments, Non-Operating
Gain (Loss) On Financial Instruments, Non-Operating
Entity Small Business
Entity Small Business
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Abstract]
Other operating expenses
Other Cost and Expense, Operating
DEBT
Long-Term Debt [Text Block]
Document Transition Report
Document Transition Report
Ownership stake
Equity Method Investment, Ownership Percentage
Underlying Securities
Award Underlying Securities Amount
Special charges related to ratification payment
Labor contract ratification bonuses
Special charge in connection with a labor contract ratification bonus
Labor Contract Ratification Bonus
Labor Contract Ratification Bonus
Equity Component [Domain]
Equity Component [Domain]
Document Period End Date
Document Period End Date
PEO Actually Paid Compensation Amount
PEO Actually Paid Compensation Amount
INCOME TAXES
Income Tax Disclosure [Text Block]
Aggregate balance
Contractual Obligation
Awards Close in Time to MNPI Disclosures, Table
Awards Close in Time to MNPI Disclosures [Table Text Block]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Abstract]
Scenario [Axis]
Scenario [Axis]
Pension and postretirement benefit liability
Liability, Retirement and Postemployment Benefits
Document Type
Document Type
Level 3
Fair Value, Inputs, Level 3 [Member]
EARNINGS PER SHARE
Earnings Per Share [Text Block]
Name
Outstanding Recovery, Individual Name
MileagePlus Notes
MileagePlus Senior Secured Notes Due 2027 [Member]
MileagePlus Senior Secured Notes Due 2027
Employee benefit plans
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax
Product and Service [Axis]
Product and Service [Axis]
Total operating revenue
Revenue from Contract with Customer, Excluding Assessed Tax
Revenue From Contract With Customer [Table]
Revenue From Contract With Customer [Table]
Revenue From Contract With Customer [Table] [Table]
All Individuals
All Individuals [Member]
Long-term Debt, Type [Domain]
Long-Term Debt, Type [Domain]
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Abstract]
Name
Forgone Recovery, Individual Name
Total current assets
Assets, Current
2029
Unrecorded Unconditional Purchase Obligation, to be Paid, Year Four
Statistical Measurement [Axis]
Statistical Measurement [Axis]
Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested
Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member]
Before Tax
AOCI Attributable To Parent, Before Tax [Roll Forward]
AOCI Attributable To Parent, Before Tax [Roll Forward]
Atlantic
Atlantic Destination [Member]
Aggregate Erroneous Compensation Amount
Aggregate Erroneous Compensation Amount
Peer Group Issuers, Footnote
Peer Group Issuers, Footnote [Text Block]
Earnings available to common stockholders
Net Income (Loss) Available to Common Stockholders, Basic
Entity Information [Line Items]
Entity Information [Line Items]
Erroneous Compensation Analysis
Erroneous Compensation Analysis [Text Block]
Investments and other
Other Comprehensive Income, Investments And Other, Net Of Tax
Other Comprehensive Income, Investments And Other, Net Of Tax
Fair Value [Line Items]
Fair Value [Line Items]
Fair Value [Line Items]
Balance beginning
Balance ending
AOCI Tax, Attributable to Parent
Rule 10b5-1 Arrangement Terminated
Rule 10b5-1 Arrangement Terminated [Flag]
Level 1
Fair Value, Inputs, Level 1 [Member]
Restricted cash — noncurrent
Restricted Cash, Noncurrent, Fair Value Disclosure
Restricted Cash Fair Value Disclosure
Deferred Taxes
AOCI Attributable To Parent, Tax [Roll Forward]
AOCI Attributable To Parent, Tax [Roll Forward]
Earnings per share, diluted (in dollars per share)
Earnings Per Share, Diluted
Erroneously Awarded Compensation Recovery
Erroneously Awarded Compensation Recovery [Table]
Title of 12(b) Security
Title of 12(b) Security
Investing and Financing Activities Not Affecting Cash:
Investing and Financing Activities Not Affecting Cash:
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Floating Rate Debt
Floating Rate Debt [Member]
Floating Rate Debt [Member]
Earnings Per Share [Abstract]
Earnings Per Share [Abstract]
Total nonoperating expense, net
Nonoperating Income (Expense)
After 2029
Unrecorded Unconditional Purchase Obligation, To Be Paid, After Year Four
Unrecorded Unconditional Purchase Obligation, To Be Paid, After Year Four
Frequent flyer deferred revenue
Contract With Customer, Liability, Noncurrent, Frequent Flyer
Contract With Customer, Liability, Noncurrent, Frequent Flyer
Other
Stockholders' Equity, Other
Repurchase of common stock (in shares)
Number of shares repurchased (in shares)
Treasury Stock, Shares, Acquired
Scenario, Plan
Scenario, Plan [Member]
Award Timing Disclosures [Line Items]
Service cost
Defined Benefit Plan, Service Cost
Measurement Frequency [Domain]
Measurement Frequency [Domain]
Accrued salaries and benefits
Employee-related Liabilities, Current
Carrying amount of loan receivable
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss
Net income
Net income
Net Income (Loss) Attributable to Parent
Expiration Date
Trading Arrangement Expiration Date
Variable interest
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage
J. Scott Kirby [Member]
J. Scott Kirby
Gains on various aircraft sale-leaseback transactions
Gain (Loss) On Aircraft Sale-Leaseback Transactions
Gain (Loss) On Aircraft Sale-Leaseback Transactions
Other fixed-income securities
Fixed Income Securities [Member]
Operating property and equipment, net
Property, Plant and Equipment, Net
Repurchases of common stock
Payments for Repurchase of Common Stock
Adoption Date
Trading Arrangement Adoption Date
2026
Unrecorded Unconditional Purchase Obligation, to be Paid, Year One
Compensation Actually Paid vs. Net Income
Compensation Actually Paid vs. Net Income [Text Block]
(Receivable from) Payable to Related Parties, Net
Receivables from Stockholder [Member]
Potential equity investments in connection with reorganization process
Equity Securities, Restructuring Agreement, Maximum Investment
Equity Securities, Restructuring Agreement, Maximum Investment
Entity Current Reporting Status
Entity Current Reporting Status
Awards Close in Time to MNPI Disclosures
Awards Close in Time to MNPI Disclosures [Table]
Operating leases converted to finance leases
Operating Leases Converted To Finance Leases
Operating Leases Converted To Finance Leases
Non-travel miles redeemed
Non-Travel Miles Redemption, Frequent Flyer Deferred Revenue
Non-travel miles redemption, frequent flyer deferred revenue.
Operating income
Operating Income (Loss)
Retained earnings
Retained Earnings (Accumulated Deficit)
Commitments and Contingencies [Line Items]
Commitments and Contingencies [Line Items]
Commitments And Contingencies [Line Items]
Statement of Financial Position [Abstract]
Statement of Financial Position [Abstract]
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]
Executive Category:
Executive Category [Axis]
Passenger revenue
Passenger revenue
Passenger [Member]
Current Fiscal Year End Date
Current Fiscal Year End Date
Class of Stock [Axis]
Class of Stock [Axis]
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Other Equity Investments
Other Equity Investments [Member]
Other Investments
Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table
Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member]
Aircraft Type [Axis]
Aircraft Type [Axis]
Mesa
Mesa Air Group, Inc. [Member]
Mesa Air Group, Inc.
Retirement Plan Type [Axis]
Retirement Plan Type [Axis]
Miscellaneous, net
Other Nonoperating Income (Expense)
Statement [Table]
Statement [Table]
Restricted cash — current
Restricted Cash, Current, Fair Value Disclosure
Restricted Cash, Current, Fair Value Disclosure
Financing Activities:
Financing Activities:
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]
Equity Awards Adjustments, Excluding Value Reported in Compensation Table
Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member]
Percentage of employees represented by various U.S. labor organizations
Percentage Of Employees Represented By Labor Organizations
Percentage of employees represented by labor organizations
Receivables, net
Receivables, net
Receivables, Net, Current
Beginning Balance
Ending Balance
Contract with Customer, Liability
Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Equity securities
Equity Securities, FV-NI, Current
Advance ticket sales
Contract With Customer, Liability, Current, Advance Ticket Sales
Contract With Customer, Liability, Current, Advance Ticket Sales
Reconciliation of cash, cash equivalents and restricted cash:
Cash and Cash Equivalents [Abstract]
Number of aircraft operated
Number of Aircraft Operated
Property and equipment acquired through the issuance or modification of debt, finance leases and other financial liabilities
Noncash Or Part Noncash Acquisition, Fixed Assets Acquired, Net Of Vendor Credits
Noncash Or Part Noncash Acquisition, Fixed Assets Acquired, Net Of Vendor Credits
Potentially dilutive securities (in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Total
Unrecorded Unconditional Purchase Obligation
All Adjustments to Compensation
All Adjustments to Compensation [Member]
Fair Value, by Balance Sheet Grouping [Table]
Fair Value, by Balance Sheet Grouping [Table]
Amendment Flag
Amendment Flag
2027
Long-Term Debt, Maturity, Year Two
Other Postretirement Benefits
Other Postretirement Benefits Plan [Member]
Revenue From Contract With Customer [Line Items]
Revenue From Contract With Customer [Line Items]
[Line Items] for Revenue From Contract With Customer [Table] [Table]
Stock held in treasury, at cost
Treasury Stock, Common, Value
Termination Date
Trading Arrangement Termination Date
Net cash used in financing activities
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation
Insider Trading Policies and Procedures Adopted
Insider Trading Policies and Procedures Adopted [Flag]
Measure:
Measure [Axis]
2027
Unrecorded Unconditional Purchase Obligation, to be Paid, Year Two
Basic weighted-average shares outstanding (in shares)
Weighted Average Number of Shares Outstanding, Basic
Distribution expenses
Selling Expense
Value of authorized shares yet to be purchased under program
Share Repurchase Program, Remaining Authorized, Amount
Schedule of Computation of Basic and Diluted Earnings Per Share
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Pay vs Performance Disclosure, Table
Pay vs Performance [Table Text Block]
Debt Disclosure [Abstract]
Debt Disclosure [Abstract]
Forgone Recovery due to Violation of Home Country Law, Amount
Forgone Recovery due to Violation of Home Country Law, Amount
Nonoperating income (expense):
Nonoperating income (expense):
Nonoperating Income (Expense) [Abstract]
Entity Tax Identification Number
Entity Tax Identification Number
Scenario [Domain]
Scenario [Domain]
Operating expense:
Operating expense:
Costs and Expenses [Abstract]
Amounts reclassified to earnings
Reclassification from AOCI, Current Period, Tax
Amounts reclassified to earnings
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent
Unamortized debt discount
Debt Instrument, Unamortized Discount
Restructuring and Related Activities [Abstract]
Restructuring and Related Activities [Abstract]
Forgone Recovery due to Expense of Enforcement, Amount
Forgone Recovery due to Expense of Enforcement, Amount
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Advance Ticket Sales
Advance Ticket Sales [Member]
Advance Ticket Sales [Member]
Common shares, issued (in shares)
Common Stock, Shares, Issued
2029
Long-Term Debt, Maturity, Year Four
CommuteAir
CommuteAir LLC [Member]
CommuteAir LLC [Member]
UAL And United
UAL And United [Member]
UAL And United [Member]
Term Loan Facility
Term Loan Facility [Member]
Term Loan Facility Due
Interest expense
Interest Expense, Nonoperating
Trading Arrangement:
Trading Arrangement [Axis]
United Airlines Ventures Sustainable Flight Fund
United Airlines Ventures Sustainable Flight Fund [Member]
United Airlines Ventures Sustainable Flight Fund [Member]
Total Shareholder Return Amount
Total Shareholder Return Amount
Aircraft rent
Aircraft Rental
Insider Trading Arrangements [Line Items]
Security Exchange Name
Security Exchange Name
Last Three Months of 2025
Long-Term Debt, Maturity, Remainder of Fiscal Year
Travel miles redeemed
Travel Miles Redemption, Frequent Flyer Deferred Revenue
Travel miles redemption, frequent flyer deferred revenue.
Total noncurrent liabilities
Liabilities, Noncurrent
Other operating revenue
Other Operating Revenue
Product and Service, Other [Member]
Purchase commitments
Capital Addition Purchase Commitments [Member]
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name [Domain]
Pension Adjustments Prior Service Cost
Pension Adjustments Prior Service Cost [Member]
Redemption of aggregate principal amount of outstanding debt
Debt Instrument, Repurchased Face Amount
Material Terms of Trading Arrangement
Material Terms of Trading Arrangement [Text Block]
Other
Other Liabilities, Current
Asset Class [Domain]
Asset Class [Domain]
Statement [Line Items]
Statement [Line Items]
Rule 10b5-1 Arrangement Adopted
Rule 10b5-1 Arrangement Adopted [Flag]
Cash and cash equivalents
Cash and cash equivalents
Cash and Cash Equivalent
Common Stock
Common Stock [Member]
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Non-NEOs
Non-NEOs [Member]
Corporate debt
Corporate Debt Securities [Member]
Net increase (decrease) 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