James Stewart

as Charles Augustus 'Slim' Lindbergh

Murray Hamilton

as Bud Gurney

Patricia Smith

as Mirror Girl

Bartlett Robinson

as Benjamin Frank Mahoney, President Ryan Airlines Co.

Marc Connelly

as Father Hussman

Arthur Space

as Donald Hall, Chief Engineer Ryan Airlines

Charles Watts

as O.W. Schultz, Salesman Atlas Suspender Co.

Erville Alderson

as Burt (uncredited)