Pat Stanley was nominated for the 1962 Tony Award (New York City) for Supporting or Features Actress in a Drama for "Sunday in New York".
Despite signs that read Idlewild International Airport, the airport scenes were filmed at the clearly recognizable Los Angeles International Airport, including the long corridor of mosaic tile that Cliff Robertson runs down, and - reflected in a window of a door when Robertson leaves the terminal and walks downstairs to the tarmac - the famous Theme Building.
The New York production of the musical "Sunday in New York" by Norman Krasna opened at the Cort Theater in New York on November 27, 1961 and ran for 188 performances. The original Broadway cast included a young Robert Redford.
The sports car being driven is a Mercedes Benz 190SL.