Boeing Air Transport was formed on February 17, 1927 by William Boeing to operate the Contract Air Mail (CAM) service between San Francisco and Chicago (CAM.18), taking over the route on July 1, 1927.
Boeing Air Transport fundouna o 17 de febreiro de 1927 William Boeing para operar o servizo Contract Air Mail (CAM) entre San Francisco e Chicago (CAM.18), facéndose coa ruta o 1 de xullo dese ano.