Some Came Running (1959, Frank Sinatra, Dean Martin, Shirley MacLean)

Sinatra and MacLean arrive in town on a "Greyhound PD-4104 (the first GM coach type bus with the big windows...built 1953-60)." (thanks Bruce Korusek). A later scene at the bus station features a white/grey/red motorcoach and a green and white motorcoach (with a white star on the front) with Chicago as its destination. The latter appears again at the end of the film, leaving town. (thanks Denise Annells)