"AA","American"
"AS","Alaska"
"B6","JetBlue"
"CO","Continental"
"DL","Delta"
"OO","SkyWest"
"UA","United"
"US","US_Airways"
"WN","Southwest"
"EV","Atlantic_Southeast"
"F9","Frontier"
"FL","AirTran"
"MQ","American_Eagle"
"XE","ExpressJet"
"YV","Mesa"