Three persons from "Planes, Trains and Automobiles" are also in John Hughes
80's masterpiece "Ferris Buellers Day Off
1. Steve Martin's colleague in the beginning of the movie, he plays Ferris Buellers dad.
2. The car rental woman Steve Martin verbally abuses in the airport, she plays Ed Rooneys secretary in "Ferris Buellers Day Off".
3. The boring guy in the airport (Ben Stein) announcing that all flights to chicago are cancelled. He also plays a deliberate boring Business teacher in "Ferris Buellers Day Off".