Planes, Trains and Automobiles is a 1987 American road trip comedy film written, produced, and directed by John Hughes and starring Steve Martin and John Candy, with supporting roles by Laila Robins and Michael McKean. It tells the story of Neal, an uptight marketing executive, and Del, a well-meaning but annoying salesman, who become travel companions when their flight is diverted, and embark on a 3-day odyssey of misadventures trying to reach Chicago in time for Neal's Thanksgiving Day dinner with his family.

The film was released on November 25, 1987, to critical acclaim, with many praising it for Hughes' deviation from teen comedies, as well as the cast performances. It was also a box office success, earning $49.5 million on a $15 million budget. The film has gained a cult following over the years, being a Thanksgiving tradition for many.