Date Established1927SubjectAirlinesDescriptionBoeing Air Transport, also seen as BAT or B.A.T., began in 1927 as an airmail carrier. It merged with various companies over the next few years and became United Aircraft and Transport Corporation (UATC) in 1929. In 1931 UATC, which included Boeing Air Transport, National Air Transport, Varney Airlines and Pacific Air Transport, established United Air Lines, which offered passenger and mail service from coast to coast.