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REVENUE RECOGNITION
 9 Months Ended
Sep. 30, 2025
Revenue from Contract with Customer [Abstract]  
REVENUE RECOGNITION REVENUE RECOGNITION
Revenue by Geography. The table below presents the Company's operating revenue by principal geographic region (in millions):
Three Months Ended September 30,Nine Months Ended September 30,
2025202420252024
Domestic (U.S. and Canada)$8,990 $8,648 $25,808 $25,082 
Atlantic3,486 3,432 8,755 8,542 
Pacific1,568 1,531 5,009 4,721 
Latin America1,181 1,232 4,100 4,023 
Total$15,225 $14,843 $43,673 $42,368 
Advance ticket sales. In the nine months ended September 30, 2025 and 2024, the Company recognized approximately $5.8 billion and $5.2 billion, respectively, of passenger revenue for tickets that were included in Advance ticket sales at the beginning of those periods.
Ancillary services. The Company recorded approximately $1.3 billion and $3.5 billion of ancillary fees within passenger revenue in the three and nine months ended September 30, 2025, respectively. The Company recorded approximately $1.1 billion and $3.3 billion of ancillary fees within passenger revenue in the three and nine months ended September 30, 2024, respectively.
Frequent flyer deferred revenue. The table below presents a roll forward of Frequent flyer deferred revenue (in millions):
Three Months Ended September 30,Nine Months Ended September 30,
2025202420252024
Beginning Balance$7,665 $7,353 $7,441 $7,143 
Miles earned968 884 2,878 2,643 
Travel miles redeemed(896)(842)(2,514)(2,325)
Non-travel miles redeemed(36)(24)(103)(90)
Ending Balance$7,702 $7,371 $7,702 $7,371 
In the three and nine months ended September 30, 2025, the Company recognized, in Other operating revenue, $0.8 billion and $2.4 billion, respectively, related to the marketing, advertising, non-travel miles redeemed (net of related costs) and other travel-related benefits of the mileage revenue associated with our various partner agreements including, but not limited to, our JPMorgan Chase Bank, N.A. MileagePlus co-brand agreement. In the three and nine months ended September 30, 2024, the Company recognized, in Other operating revenue, $0.7 billion and $2.2 billion, respectively, related to those agreements. The portion related to the MileagePlus miles awarded of the total amounts received from our various partner agreements is deferred and presented in the table above as an increase to Frequent flyer deferred revenue.