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Special Charges - Restructuring and Related Costs (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2025	Jun. 30, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Unusual or Infrequent Item, or Both [Line Items]
Airline special charges			$ 43,539	$ 45,307	$ 35,091
Sunseeker impairment			137,705	368,131	28,645
Accelerated Depreciation On Airframes Identified For Early Retirement
Unusual or Infrequent Item, or Both [Line Items]
Airline special charges			8,029	31,066	35,091
Organizational Restructuring
Unusual or Infrequent Item, or Both [Line Items]
Airline special charges		$ 12,095		3,420	0
Accelerated Amortization And Disposal Of Software Identified For Redevelopment
Unusual or Infrequent Item, or Both [Line Items]
Airline special charges			19,292	0	0
Acquisition Restructuring Cost
Unusual or Infrequent Item, or Both [Line Items]
Airline special charges		$ 4,123		0	0
Flight Attendant Ratification Bonus
Unusual or Infrequent Item, or Both [Line Items]
Airline special charges	$ 0			10,821	0
Sunseeker Special Charges
Unusual or Infrequent Item, or Both [Line Items]
Sunseeker weather events, net of insurance recoveries(1)			$ 94,166	$ 322,824	$ (6,446)

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Restructuring Charges, Net Of Recoveries

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Amount of restructuring charges, remediation cost, and asset impairment loss.

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