Revenue (Tables)

3 Months Ended

Mar. 31, 2018

Summary of Roll Forward of Frequent Flyer Deferred Revenue

The table below presents a roll forward of Frequent flyer deferred revenue (in millions):

	Three Months Ended March 31,
	2018		2017
Total Frequent flyer deferred revenue—beginning balance	$	4,783	$	4,889
Total miles awarded		603		488
Travel miles redeemed (Passenger revenue)		(409)		(398)
Non-travel miles redeemed (Other operating revenue)		(40)		(39)
Total Frequent flyer deferred revenue—ending balance	$	4,937	$	4,940

Summary of Passenger Revenue by Geographic Region and by Mainline Versus Regional

The following table presents passenger revenue by geographic region and by mainline versus regional for the three months ended March 31 (in millions):

	2018		2017
Mainline	$	3,485	$	3,272
Regional		1,483		1,379
Domestic		4,968		4,651
Atlantic		1,252		1,117
Pacific		1,069		1,053
Latin America		860		832
International		3,181		3,002
Consolidated	$	8,149	$	7,653
Mainline		6,616		6,227
Regional		1,533		1,426
Consolidated	$	8,149	$	7,653