Table 11.  System* Airline Unit Costs (Cents per Mile),,,,,,,
Low-Cost Carriers,,,,,,,
Ranked by 3rd Quarter 2007 Unit Costs ,,,,,,,
(Operating Expenses per Available Seat Mile in cents),,,,,,,
3Q 2007 Rank,Low-Cost Carriers,3rd Quarter 2006 ,4th Quarter 2006 ,1st Quarter 2007 ,2nd Quarter 2007 ,3rd Quarter 2007 ,3rd Quarter Operating Expenses $(Millions)
1,America West,14.1,13.6,12.1,13.1,13.5,932
2,Frontier,11.1,10.8,9.7,10.7,10.8,350
3,AirTran,9.9,9.2,9.4,9.4,9.5,570
4,Southwest,8.7,8.8,8.9,9.0,9.1,"2,336"
5,Spirit,11.7,10.9,8.4,8.5,8.7,197
6,JetBlue,7.9,7.9,8.3,8.0,8.3,689
7,ATA**,9.5,9.1,9.9,9.3,N/A,N/A
,Seven-Carrier Total**,9.8,9.6,9.4,9.6,N/A,N/A
Source: Bureau of Transportation Statistics; Form 41; Schedule P1.2.  T100; T2 Data,,,,,,,
* System = domestic + international ,,,,,,,
** No calculations were made for 3rd Quarter 2007 because ATA Airlines failed to file its quarterly financial report with BTS.,,,,,,,