Table 12.  System* Airline Unit Costs (Cents per Mile),,,,,,,
Regional Carriers,,,,,,,
Ranked by 2nd Quarter 2007 Unit Costs ,,,,,,,
(Operating Expenses per Available Seat Mile in cents),,,,,,,
2Q 2007 Rank,Regional Carriers,2nd Quarter 2006 ,3rd Quarter 2006 ,4th Quarter 2006 ,"1st
 Quarter 2007 ",2nd Quarter 2007 ,2nd Quarter Operating Expenses $(Millions)
1,Comair,16.4,16.0,16.1,17.6,17.3,262
2,American Eagle,15.5,15.5,14.8,15.7,16.3,461
3,Atlantic Southeast,13.8,12.6,13.9,14.8,14.9,306
4,Express Jet,11.4,11.2,11.9,13.1,14.2,434
5,Mesa,14.1,14.4,13.7,13.9,14.1,270
6,Sky West,14.1,14.0,13.8,13.2,12.7,478
7,Pinnacle,13.4,12.5,9.7,9.1,8.8,136
,Seven-Carrier Total,13.9,13.7,13.5,14.0,14.1,"2,346"
Source: Bureau of Transportation Statistics; Form 41; Schedule P1.2.  T100; T2 Data,,,,,,,
* System = domestic + international,,,,,,,
 ,,,,,,,