REVENUE (Tables)

12 Months Ended

Dec. 31, 2023

Revenue from Contract with Customer [Abstract]

Disaggregation of Passenger Revenue

The following table provides the components of Passenger revenue recognized for the years ended December 31, 2023, 2022, and 2021:

	Year ended December 31,
(in millions)	2023		2022		2021
Passenger non-loyalty	$	19,073	$	17,645	$	11,377
Passenger loyalty - air transportation	3,639		3,028		2,136
Passenger ancillary sold separately	925		735		553
Total passenger revenues	$	23,637	$	21,408	$	14,066

Rollforward of Air Traffic Liability

As of the years ended December 31, 2023 and 2022, the components of Air traffic liability, including contract liabilities based on tickets sold and unused flight credits available to the Customer, both of which are net of recorded breakage, and loyalty points available for redemption, within the Consolidated Balance Sheet were as follows:

	Balance as of
(in millions)	December 31, 2023		December 31, 2022
Air traffic liability - passenger travel and ancillary passenger services	$	3,363	$	3,061
Air traffic liability - loyalty program	4,916		5,189
Total Air traffic liability	$	8,279	$	8,250

Rollforwards of the Company's Air traffic liability - loyalty program for the years ended December 31, 2023 and 2022 were as follows (in millions):

	Year ended December 31,
	2023		2022
Air traffic liability - loyalty program - beginning balance	$	5,189	$	4,789
Amounts deferred associated with points awarded	3,466		3,506
Revenue recognized from points redeemed - Passenger	(3,639)		(3,028)
Revenue recognized from points redeemed - Other	(100)		(78)
Air traffic liability - loyalty program - ending balance	$	4,916	$	5,189

Air traffic liability includes consideration received for ticket and loyalty related performance obligations which have not been satisfied as of a given date. Rollforwards of the amounts included in Air traffic liability as of December 31, 2023 and 2022 were as follows (in millions):

	Air traffic liability
Balance at December 31, 2022	$	8,250
Current period sales (passenger travel, ancillary services, flight loyalty, and partner loyalty)	23,766
Revenue from amounts included in contract liability opening balances	(5,031)
Revenue from current period sales	(18,706)
Balance at December 31, 2023	$	8,279

	Air traffic liability
Balance at December 31, 2021	$	7,725
Current period sales (passenger travel, ancillary services, flight loyalty, and partner loyalty)	22,012
Revenue from amounts included in contract liability opening balances	(4,976)
Revenue from current period sales	(16,511)
Balance at December 31, 2022	$	8,250