Securities and Exchange Commission

Increase (Decrease) in Frequent Flyer Liability

The increase (decrease) during the reporting period in the amount of unearned revenue related to the estimated incremental cost for points or miles outstanding and awards that expect to be redeemed through customer loyalty programs.

Compare To Other Companies

Annual (USD)

Value	Reported On	Form	FY	FP	Start Date	End Date	Fiscal Period
$140,000,000.00	2015-02-25	10-K	2014	FY	2012-01-01	2012-12-31	CY2012
$38,000,000.00	2016-02-24	10-K	2015	FY	2013-01-01	2013-12-31	CY2013
$-229,000,000.00	2017-02-22	10-K	2016	FY	2014-01-01	2014-12-31	CY2014
$-295,000,000.00	2018-02-21	10-K	2017	FY	2015-01-01	2015-12-31	CY2015
$264,000,000.00	2018-02-21	10-K	2017	FY	2016-01-01	2016-12-31	CY2016
$2,000,000.00	2018-02-21	10-K	2017	FY	2017-01-01	2017-12-31	CY2017

All Reported Increase (Decrease) in Frequent Flyer Liability (USD)

Value	Reported On	Form	FY	FP	Start Date	End Date	Fiscal Period
$140,000,000.00	2015-02-25	10-K	2014	FY	2012-01-01	2012-12-31	CY2012
$38,000,000.00	2015-02-25	10-K	2014	FY	2013-01-01	2013-12-31
$38,000,000.00	2016-02-24	10-K	2015	FY	2013-01-01	2013-12-31	CY2013
$-229,000,000.00	2015-02-25	10-K	2014	FY	2014-01-01	2014-12-31
$-229,000,000.00	2016-02-24	10-K	2015	FY	2014-01-01	2014-12-31
$-229,000,000.00	2017-02-22	10-K	2016	FY	2014-01-01	2014-12-31	CY2014
$-295,000,000.00	2016-02-24	10-K	2015	FY	2015-01-01	2015-12-31
$-295,000,000.00	2017-02-22	10-K	2016	FY	2015-01-01	2015-12-31
$-295,000,000.00	2018-02-21	10-K	2017	FY	2015-01-01	2015-12-31	CY2015
$264,000,000.00	2017-02-22	10-K	2016	FY	2016-01-01	2016-12-31
$264,000,000.00	2018-02-21	10-K	2017	FY	2016-01-01	2016-12-31	CY2016
$2,000,000.00	2018-02-21	10-K	2017	FY	2017-01-01	2017-12-31	CY2017