Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 967,315	$ 461,279
Air traffic liability	558,303		$ 382,317
DOT—Domestic
Disaggregation of Revenue [Line Items]
Total operating revenues	827,054	408,693
DOT—Latin America
Disaggregation of Revenue [Line Items]
Total operating revenues	140,261	52,586
Total passenger revenues
Disaggregation of Revenue [Line Items]
Total operating revenues	949,744	450,335
Fare
Disaggregation of Revenue [Line Items]
Total operating revenues	418,418	174,287
Non-fare
Disaggregation of Revenue [Line Items]
Total operating revenues	531,326	276,048
Other
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 17,571	$ 10,944