B.A.T. was so successful that it acquired Pacific Air Transport.
Aircraft builder William Boeing, Philip Johnson, Claire Egtvedt, and Eddie Hubbard created Boeing Air Transport (B.A.T.) in 1927 to fly the mail from Chicago to San Francisco. B.A.T. was so successful that it acquired Pacific Air Transport. By 1931 these two airlines, along with Varney Air Lines and National Air Transport, were operating as United Air Lines.