REVENUE RECOGNITION (Tables)

12 Months Ended

Dec. 31, 2023

Revenue from Contract with Customer [Abstract]

Schedule of disaggregation of revenue

Passenger revenue is composed of passenger ticket sales, loyalty travel awards and travel-related services performed in conjunction with a passenger’s flight.

Passenger revenue by category
	Year Ended December 31,
(in millions)	2023		2022		2021
Ticket	$	43,596	$	35,626	$	19,339
Loyalty travel awards	3,462		2,898		1,786
Travel-related services	1,851		1,694		1,394
Total passenger revenue	$	48,909	$	40,218	$	22,519

Other Revenue

	Year Ended December 31,
(in millions)	2023		2022		2021
Refinery	$	3,379	$	4,977	$	3,229
Loyalty program	3,093		2,597		1,770
Ancillary businesses	840		846		793
Miscellaneous	1,104		894		556
Total other revenue	$	8,416	$	9,314	$	6,348

Schedule loyalty program activity

The table below presents the activity of the current and noncurrent loyalty program deferred revenue, and includes miles earned through travel and miles sold to participating companies, which are primarily through marketing agreements.

Loyalty program activity
(in millions)	2023		2022		2021
Balance at January 1	$	7,882	$	7,559	$	7,182
Miles earned	4,173		3,419		2,238
Travel miles redeemed	(3,462)		(2,898)		(1,786)
Non-travel miles redeemed	(173)		(198)		(75)
Balance at December 31	$	8,420	$	7,882	$	7,559

Schedule of revenue by geographic region

Our passenger and operating revenue by geographic region are summarized in the following table:

Revenue by geographic region
	Passenger Revenue						Operating Revenue
	Year Ended December 31,						Year Ended December 31,
(in millions)	2023		2022		2021		2023		2022		2021
Domestic	$	33,968	$	30,197	$	18,468	$	40,845	$	38,478	$	24,320
Atlantic	9,057		6,093		1,777		10,458		7,429		2,537
Latin America	3,798		2,889		1,873		4,292		3,334		2,284
Pacific	2,086		1,039		401		2,453		1,341		758
Total	$	48,909	$	40,218	$	22,519	$	58,048	$	50,582	$	29,899