Table 11.  Airline Domestic Unit Costs (Cents per Mile),,,,,,,
Low-Cost Carriers,,,,,,,
Ranked by 1st Quarter 2006 Domestic Unit Costs ,,,,,,,
(Domestic Operating Expenses per Available Seat Mile in cents) ,,,,,,,
1Q 2006 Rank,Low-Cost Carriers,1st Quarter 2005 ,2nd Quarter 2005 ,3rd Quarter 2005 ,4th Quarter 2005 ,1st Quarter 2006 ,1st Quarter Operating Expenses $(Millions)
1,America West,9.7,11.4,12.2,13.4,11.3,779.0
2,Frontier,11.3,10.7,10.3,11.2,11.1,238.7
3,AirTran,8.7,9.0,9.6,9.8,9.8,419.4
4,Spirit,8.8,10.2,9.7,10.6,9.5,123.2
5,Southwest,7.7,7.1,7.8,8.4,8.7,"1,921.3"
6,JetBlue,6.7,6.7,7.0,7.3,7.8,515.4
7,ATA*,16.4,9.3,13.8,3.4,N/A,N/A
,Seven-Carrier Total**,8.8,8.3,9.1,9.2,9.2,"3,997.0"
Source: Bureau of Transportation Statistics; Form 41; Schedule P1.2.  T100; T2 Data.,,,,,,,
* ATA Airlines was granted an extension to file until June 30.,,,,,,,
** Six-Carrier Total for First Quarter 2006,,,,,,,