James Keach
Motorcycle Cop
Beverly D'Angelo
Ellen Griswold
Harold Ramis
Car salesman (voice) (uncredited)
Brian Doyle-Murray
Kamp Komfort Clerk
Frank McRae
Grover
Randy Quaid
Cousin Eddie
Anthony Michael Hall
Rusty Griswold
John Diehl
Assistant Mechanic
John Candy
Lasky, Guard at Walleyworld
Jane Krakowski
Cousin Vicki
Michael Talbott
Cowboy
Henry Gibson
Hotel clerk (uncredited)
Eugene Levy
Car Salesman
James Staley
Motel Desk Clerk
Miriam Flynn
Cousin Catherine
Tessa Richarde
Motel Guest
Chevy Chase
Clark Griswold
Imogene Coca
Aunt Edna
John P. Navin, Jr.
Cousin Dale
Gerry Black
Davenport
Mickey Jones
Mechanic
Eddie Bracken
Roy Walley
Randy Lowell
Wyatt Earp
Christie Brinkley
Girl In The Red Ferrari
Dana Barron
Audrey Griswold
Nathan Cook
Man Giving Directions