John Candy plays Jack Chester, the stressed-out air traffic controller who takes his family on a summer vacation to Florida.
Richard Crenna portrays Al Pellet, the competitive yacht owner who challenges Jack to a race.
Rip Torn is Scully, the boat rental owner who gets caught up in the chaos caused by Jack and his family.
Karen Austin plays Sandy Chester, Jack's supportive wife who tries to keep the family vacation on track.
Kerri Green portrays Jennifer Chester, Jack and Sandy's teenage daughter caught up in summer romance.
John Larroquette plays Don Moore, the arrogant yacht club commodore who clashes with Jack.
Joey Lawrence is Bobby Chester, the adventurous son of Jack and Sandy.
Aubrey Jene portrays Laurie Chester, the youngest daughter of the Chester family.
Dick Anthony Williams plays Dan Gardner, Jack's friend who joins the family on vacation.
Richard Herd is Angus MacLachlan, the wealthy businessman who befriends Jack at the beach.
Carmine Caridi plays Ed, a local resident who provides comedic relief in the movie.
Lois Hamilton portrays Vicki, the attractive and mysterious woman who catches the eye of Jack Chester.
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