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Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Passenger	$ 2,324,397	$ 2,137,762	$ 1,578,436
Scheduled Service Revenue
Disaggregation of Revenue [Line Items]
Passenger	1,133,001	1,062,753	769,371
Air-related revenue
Disaggregation of Revenue [Line Items]
Passenger	1,137,226	1,025,549	788,064
Co-brand Revenue
Disaggregation of Revenue [Line Items]
Passenger	$ 54,170	$ 49,460	$ 21,001

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