REVENUE RECOGNITION - Schedule of Disaggregates Revenue by Service Type and the Timing (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Total Revenue	$ 168,922	$ 177,530
Services transferred at a point in time: \| Flights, net of discounts and incentives
Disaggregation of Revenue [Line Items]
Total Revenue	143,538	147,568
Services transferred at a point in time: \| Other
Disaggregation of Revenue [Line Items]
Total Revenue	19,366	19,784
Services transferred over time: \| Memberships
Disaggregation of Revenue [Line Items]
Total Revenue	6,018	9,189
Services transferred over time: \| Other
Disaggregation of Revenue [Line Items]
Total Revenue	$ 0	$ 989

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details