When the passengers are entering the plane at the beginning of the film, the door says the aircraft is named "Flagship Illinois." However, when the same plane begins to taxi from the gate the name painted on the nose is "Flagship Tennessee." When the passengers are debarking, the door says the plane has again become the "Flagship Illinois."
When the plane has finished boarding and the pilot waves good-bye and starts to taxi, the officer near the rear of the plane appears to be in front of the tailplane. When the camera angle changes, he's behind the tailplane, but we didn't see him duck or move out of the way.
The plane shown boarding at the beginning of the film has registration NC16002. However, the model used to show it in flight has registration NC17333 - an airplane that will be seen later in the film named "Flagship Chicago".
When Nan chases Artie up a tall ladder in the hanger, a clear moving shadow of the boom microphone is visible on the rafters above them.
In the stewardess lounge, Mabel is asked who she has a crush on. She replies that she liked Jimmy Cagney until he "pushed Ann Sheridan in the face with a grapefruit." It was Mae Clarke who took the grapefruit in the kisser in "The Public Enemy."