The Pursuit of D. B. Cooper is a 1981 film about infamous aircraft hijacker D. B. Cooper, who escaped with 200,000 after leaping from the back of a plane. The bulk of the film fictionalizes Coopers escape after he landed on the ground.
Gruen confronts the Meades at the rafting company, but they escape down the river. The Meades lead Gruen and Remson separately on a crosscountry chase involving various stolen cars. Gruen is fired from the pursuit by his employer, yet continues the chase to claim the money for himself. At an air yard where the Meades acquire a hotair balloon, Gruen steals the money from Hannah, and Meade chases him down with a barely functioning biplane. Meade runs Gruen off the road and crashes the plane. They discuss how Gruen knew it was Meade Gruen thought of him because of their history. Meade leaves Gruen with a couple bundles of the cash, and walks away with the rest, to be picked up by Hannah.At the end, Remson reaches a crossroads the Meades have just passed thinking he sees their truck parked nearby, he continues the chase. ........
Source: Wikipedia