Dolores Hart as Donna Stuart

Hugh O'Brian as First Officer Ray Winsley

Karlheinz Böhm as Baron Franz Von Elzingen

Pamela Tiffin as Carol Brewster

Lois Nettleton as Hilda 'Bergie' Bergstrom

Dawn Addams as Katie Rinard

Karl Malden as Walter Lucas

Richard Wattis as Oliver Garson

Andrew Cruickshank as Cardwell

James Dobson as Flight Engineer Teddy Shepard

Lois Maxwell as Gwen Sandley

John Crawford as Co-Pilot

Robert Easton as Navigator

Guido Wieland as Vienna Policeman

Maurice Marsac as Monsieur Rinard

Alain Morat as Boy in Paris