Table 4: System* Quarterly Operating profit/loss margin (in percent),,,,,,,
Regional Carriers ,,,,,,,
Ranked by 2nd Quarter 2007 Margin ,,,,,,,
(Operating Profit/Loss as Percent of Total Operating Revenue),,,,,,,
2Q 2007 Rank,Regional Carriers,2nd Quarter 2006 (%),3rd Quarter 2006 (%),4th Quarter 2006 (%),"1st
 Quarter 2007 ",2nd Quarter 2007 (%),2nd Quarter Operating Profit/Loss $(Millions)
1,Atlantic Southeast,13.2,12.1,13.1,12.9,11.6,40
2,American Eagle,8.1,9.8,10.1,11.2,10.3,53
3,Pinnacle,9.5,12.3,29.8,9.0,9.1,14
4,Sky West,10.0,9.6,7.3,7.6,9.1,48
5,Comair,2.1,6.8,4.6,2.5,7.0,20
6,Mesa ,4.1,3.7,4.3,-8.2,3.1,9
7,Express Jet,8.5,8.4,8.3,3.8,-10.3,-40
,Seven-Carrier Total,8.1,8.9,10.0,6.3,5.7,143
"Source: Bureau of Transportation Statistics; Form 41, Schedule P1.2 ",,,,,,,
* System = domestic + international,,,,,,,
 ,,,,,,,