Table 3: Quarterly Domestic Operating profit/loss margin (in percent),,,,,,, Low-Cost Carriers ,,,,,,, Ranked by 4th Quarter 2005 Margin ,,,,,,, (Operating Profit/Loss as Percent of Total Operating Revenue) ,,,,,,, 4Q 2005 Rank,Low-Cost Carriers,4th Quarter 2004 (%),1st Quarter 2005 (%),2nd Quarter 2005 (%),3rd Quarter 2005 (%),4th Quarter 2005 (%),4th Quarter Operating Profit/Loss $(Millions) 1,ATA,-187.0,-185.0,-38.9,-81.4,53.8,74 2,Southwest,7.2,6.4,11.5,13.7,8.2,163 3,AirTran,1.3,-3.2,5.3,0.3,0.9,3 4,JetBlue,3.7,6.9,9.3,3.2,-4.0,-18 5,Frontier,-7.3,-1.3,-0.2,5.2,-5.5,-13 6,America West,-6.9,6.6,3.4,-6.2,-16.5,-139 7,Spirit,-31.6,-3.8,-10.7,-14.2,-22.3,-21 ,Seven-Carrier Total,-11.5,-4.3,5.3,2.1,1.2,50 "Source: Bureau of Transportation Statistics; Form 41, Schedule P1.2 ",,,,,,,