Table 4: Regional Airline System* Quarterly Operating Profit/Loss Margin (In Percent) ,,,,,,, Ranked by 2nd Quarter 2008 Margin ,,,,,,, (Operating Profit/Loss as Percent of Total Operating Revenue) ,,,,,,, 2Q 2008 Rank,Regional Airlines,2nd Quarter 2007 (%),3rd Quarter 2007 (%),4th Quarter 2007 (%),1st Quarter 2008 (%),2nd Quarter 2008 (%),2nd Quarter Operating Profit/Loss $(Millions) 1,Comair,7.0,5.6,8.2,7.8,9.7,35 2,Atlantic Southeast,11.6,12.9,10.5,8.1,7.9,33 3,SkyWest,9.1,9.5,9.2,7.2,7.1,39 4,American Eagle,10.3,6.5,8.9,4.1,3.3,23 5,Mesa,3.1,3.6,-3.2,-2.6,-0.6,-2 6,Horizon,-1.8,4.0,-7.4,-11.0,-6.0,-11 7,ExpressJet,-10.3,-8.1,-9.4,-7.7,-9.6,-43 ,Seven-Carrier Total,5.0,4.9,3.6,2.0,2.5,73 "Source: Bureau of Transportation Statistics; Form 41, Schedule P1.2 ",,,,,,, * System = domestic + international,,,,,,, ,,,,,,,