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Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 516,251	$ 516,476	$ 1,768,274	$ 1,573,041
Scheduled service
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	231,757	254,545	862,823	775,740
Ancillary air-related charges
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	273,091	252,080	866,728	765,096
Loyalty redemptions
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 11,403	$ 9,851	$ 38,723	$ 32,205

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