Table 12. Airline Domestic Unit Costs (Cents per Mile),,,,,,, Regionals,,,,,,, Ranked by 2nd Quarter 2006 Domestic Unit Costs ,,,,,,, (Domestic Operating Expenses per Available Seat Mile in cents) ,,,,,,, 2Q 2006 Rank,Regional Carriers,2nd Quarter 2005 ,3rd Quarter 2005 ,4th Quarter 2005 ,1st Quarter 2006 ,2nd Quarter 2006 ,2nd Quarter Operating Expenses $(Millions) 1,Comair,14.1,14.7,15.4,16.4,16.4,297 2,American Eagle,14.2,14.6,15.4,15,15.3,436 3,Atlantic Southeast,12.3,13.3,13.8,14,14.2,283 4,Sky West,13.3,13.7,14.3,14.4,14.1,418 5,Mesa,10.5,10.7,11.4,12.7,14.1,277 6,Pinnacle,12.8,16.2,13.9,13.8,13.4,185 7,Express Jet,11.8,11.7,12.1,12.2,11.7,354 ,Seven-Carrier Total,12.7,13.4,13.7,14,14.1,"$2,250 " Source: Bureau of Transportation Statistics; Form 41; Schedule P1.2. T100; T2 Data.,,,,,,,