You Gotta Stay Happy (1948)

Indecisive heiress Dee Dee Dillwood is pushed into marrying her sixth fiancée, but unable to face the wedding night, she flees into the adjacent hotel room of commercial pilot Marvin Payne, who just wants to sleep. Somehow, she persuades him to take her to California. Her fellow passengers include a chimpanzee, a corpse (in a coffin), an absconding embezzler, and two smoochy newlyweds. Can love be far behind?