Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
OPERATING REVENUE:
Scheduled service revenue	$ 179,933	$ 161,634
Ancillary revenue:
Air-related charges	76,813	55,144
Third party products	10,717	9,122
Total ancillary revenue	87,530	64,266
Fixed fee contract revenue	5,187	9,631
Other revenue	309	2,320
Total operating revenue	272,959	237,851
OPERATING EXPENSES:
Aircraft fuel	108,491	102,411
Salary and benefits	41,162	33,268
Station operations	19,345	19,529
Maintenance and repairs	18,128	21,465
Sales and marketing	5,808	5,460
Aircraft lease rentals	303
Depreciation and amortization	16,892	11,970
Other	10,463	7,437
Total operating expenses	220,592	201,540
OPERATING INCOME	52,367	36,311
OTHER (INCOME) EXPENSE:
Earnings from unconsolidated affiliates, net	(38)	(45)
Interest income	(262)	(244)
Interest expense	2,188	2,074
Total other (income) expense	1,888	1,785
INCOME BEFORE INCOME TAXES	50,479	34,526
PROVISION FOR INCOME TAXES	18,648	12,823
NET INCOME	31,831	21,703
Net loss attributable to noncontrolling interest	(101)
NET INCOME ATTRIBUTABLE TO ALLEGIANT TRAVEL COMPANY	$ 31,932	$ 21,703
Earnings per share to common stockholders:
Basic (in Dollars per share)	$ 1.66	$ 1.13
Diluted (in Dollars per share)	$ 1.65	$ 1.12
Weighted average shares outstanding used in computing earnings per share to common stockholders:
Basic (in Shares)	19,081	18,989
Diluted (in Shares)	19,207	19,200