Zabriskie Point (1970) on Netflix

In what is supposed to be an indictment of 1960's American society, two aimless young adults try to find themselves in the California desert. Mark is a college student who spends most of his time attending protest rallies. He's also taken to carrying a gun which gets him into big trouble when he is incorrectly identified as the shooter in a cop killing. To get out of town, he steals a small single-engined airplane. Daria works for a property owner planning a new development but she's headed off into the desert, looking for a quiet place to meditate. When Mark and Daria meet they have sex, travel a bit together and otherwise spend their time idly wondering about life in general.