Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 1,265,537	$ 1,349,774
Air traffic liability	475,653		$ 383,751
DOT—Domestic
Disaggregation of Revenue [Line Items]
Total operating revenues	1,094,690	1,175,653
DOT—Latin America
Disaggregation of Revenue [Line Items]
Total operating revenues	170,847	174,121
Total passenger revenues
Disaggregation of Revenue [Line Items]
Total operating revenues	1,239,310	1,327,473
Fare
Disaggregation of Revenue [Line Items]
Total operating revenues	519,942	608,861
Non-fare
Disaggregation of Revenue [Line Items]
Total operating revenues	719,368	718,612
Other
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 26,227	$ 22,301