Table 11. System* Airline Unit Costs (Cents per Mile),,,,,,, Low-Cost Carriers,,,,,,, Ranked by 3rd Quarter 2006 Unit Costs ,,,,,,, (Operating Expenses per Available Seat Mile in cents),,,,,,, 2Q 2006 Rank,Low-Cost Carriers,3rd Quarter 2005 ,4th Quarter 2005 ,1st Quarter 2006 ,2nd Quarter 2006 ,3rd Quarter 2006 ,3rd Quarter Operating Expenses $(Millions) 1,America West,12.1,13.4,11.1,12.7,14.1,"1,063" 2,Spirit,9.7,10.6,9.5,11.5,11.7,154 3,Frontier,10.1,11.0,10.7,11.0,11.1,307 4,AirTran,9.6,9.8,9.7,10.0,9.9,491 5,ATA,13.1,4.2,10.0,10.0,9.5,210 6,Southwest,7.8,8.4,8.7,8.9,8.7,"2,081" 7,JetBlue,6.9,7.3,7.8,7.8,7.9,594 ,Seven-Carrier Total,9.1,9.2,9.2,9.7,9.8,"4,899" Source: Bureau of Transportation Statistics; Form 41; Schedule P1.2. T100; T2 Data.,,,,,,, * System = domestic + international ,,,,,,, ,,,,,,,