13 Hours By Air (1937)

Airline pilot Jack Gordon (Fred MacMurray) on a flight from New York to San Francisco, is immediately attracted to beautiful passenger Felice Rollins (Joan Bennett). Known as a "lady's man", he bets stewardess Vi Johnson (Ruth Donnelly) that he will take Felice out to dinner that evening.
A jewel robbery is in the news and a beautiful blonde is implicated. Jack begins to suspect that Felice may be the culprit.