Table 12:  Regional Airline System* Unit Costs ,,,,,,,
Regional Airlines Ranked by 4th Quarter 2007 Unit Costs (Cents Per ASM) ,,,,,,,
(Operating Expenses per Available Seat Mile in cents),,,,,,,
4Q 2007 Rank,Regional Airlines ,4th Quarter 2006 ,1st Quarter 2007 ,2nd Quarter 2007 ,3rd Quarter 2007 ,4th Quarter 2007 ,4th Quarter Operating Expenses $(Millions)
1,Horizon,17.9,18.6,18.6,17.4,19.6,195
2,Comair,16.1,17.6,17.3,18.1,18.5,286
3,American Eagle,14.8,15.1,16.3,16.3,17.1,473
4,Atlantic Southeast,13.9,14.8,14.9,14.1,15.5,315
5,Mesa,13.7,13.9,14.1,13.9,15.2,269
6,ExpressJet,11.9,13.1,14.2,15.0,12.6,473
7,SkyWest,13.8,13.2,12.7,12.0,12.3,467
,Seven-Carrier Total,14.1,14.7,14.9,14.7,14.9,"2,478"
Source: Bureau of Transportation Statistics; Form 41; Schedule P1.2.  T100; T2 Data,,,,,,,
* System = domestic + international,,,,,,,
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