Table 9: Passenger Airline System* Unit Costs ,,,,,,,
Airline Groups Ranked by 1st Quarter 2008 Unit Costs (Cents Per ASM) ,,,,,,,
(Operating Expenses per Available Seat Mile in cents),,,,,,,
1Q 2008 Rank,Airline  Group,1st Quarter 2007 ,2nd Quarter 2007 ,3rd Quarter 2007 ,4th Quarter 2007 ,1st Quarter 2008,1st Quarter Operating Expenses $(Millions)
1,Regional,14.7,14.9,14.7,14.9,16.3,"2,547"
2,Network,13.1,13.4,13.6,14.5,15.3,"26,966"
3,Low-Cost ,9.3,9.6,9.6,9.5,10.0,"4,577"
,21-Carrier Total,12.4,12.7,12.8,13.6,14.4,"34,089"
"Source: Bureau of Transportation Statistics; Form 41, Schedule P1.2.  T100; T2 Data",,,,,,,
* System = domestic + international,,,,,,,
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