Flight Angels

Flight Angels is a 1940 aviation film directed by Lewis Seiler from an original story by Jerry Wald and Richard Macaulay. It starred Virginia Bruce, Dennis Morgan, Wayne Morris and Ralph Bellamy as members of a fictional airline, flying Douglas DST airliners. The basic premise of the film to accurately describe the training and operational conditions of an airline, is faithfully depicted as stewardess and pilots go through the daily routine of flying in the 1940s. Note

The use of American Airlines Douglas Sleeper Transport, the initial variant of the ubiquitous Douglas DC3 airliner, that had accommodations forpassengers during day and fitted out withsleeper berths in the cabin for night, gave an air of authenticity to the film.Principal photography consisting of aerial shots and exteriors took place at Burbank Airport, California. Although a mix of studio mockups, real aircraft and model work was used effectively, the stock footage of DC3s at the beginning of the film led to Flagship Illinois becoming Flagship Tennessee as the airliner begins to taxi from the gate and then becomes the Flagship Illinois again as passengers are leaving after a bumpy landing, necessitated by the birth on board of a baby. ........

Source: Wikipedia