Robertson Aircraft Corporation was organized in 1921 in Missouri as a general flying service and manufacturer of aircraft.  Based at an airfield in Forest Park, outside of St. Louis.  The airline flew its first mail route on 15 April, 1926, between Chicago and St. Louis -- the flight was flown by the airline's chief pilot who was the soon to be famous -- Charles A. Lindbergh.

Robertson Aircraft Corporation office at Lambert Field

In 1929, Robertson and a number of other companies consolidated to form The Aviation Corporation which was later incorporated into American Airways, which itself became American Airlines in 1934.
 

First flight - 15, April, 1926

 

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Timetables and Promotional Materials

20 August, 1928

 

May, 1929

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