Table 12.  System* Airline Unit Costs (Cents per Mile),,,,,,,
Regional Carriers,,,,,,,
Ranked by 1st Quarter 2007 Unit Costs ,,,,,,,
(Operating Expenses per Available Seat Mile in cents),,,,,,,
1Q 2007 Rank,Regional Carriers,1st Quarter 2006 ,2nd Quarter 2006 ,3rd Quarter 2006 ,4th Quarter 2006 ,1st Quarter 2007 ,1st Quarter Operating Expenses $(Millions)
1,Comair,16.4,16.4,16.0,16.1,17.6,270
2,American Eagle,15.2,15.5,15.5,14.8,15.7,427
3,Atlantic Southeast,13.8,13.8,12.6,13.9,14.8,288
4,Mesa,12.7,14.1,14.4,13.7,13.9,258
5,Sky West,14.4,14.1,14.0,13.8,13.2,440
6,Express Jet,11.9,11.4,11.2,11.9,13.1,395
7,Pinnacle,13.8,13.4,12.5,9.7,9.1,131
,Seven-Carrier Total,13.9,13.9,13.7,13.5,14.0,"2,208"
 Source: Bureau of Transportation Statistics; Form 41; Schedule P1.2.  T100; T2 Data,,,,,,,
* System = domestic + international ,,,,,,,
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