IMO, looking through public company filings its am
Post# of 41413
Airline_______Owned Planes______ Lease_____Percent Owned _____Year Est.
Delta___________637_____________193_________76.80%___________1924
American_______519______________411_________55.81%___________1930
United__________391______________311_________55.70%__________1926
Alaska Air_______185______________100_________64.91%__________1932
SkyWest________256______________396_________39.26%__________1972
Spirit Air_________36_______________59__________37.89%__________1980
Jet Blue_________174______________53__________76.65%__________1998