There's one scene that really stuck with me after watching "Only Angels have Wings." It is near the beginning of the movie, after we have been introduced to our leading lady, Bonnie Lee (Jean Arthur), arriving the small South American port of Barranca, a village that sits quietly between the sea and the Andes Mountains. Bonnie has a meal with two pilots, working out of a small agency that flies airmail through the dangerous mountains in even worse flying conditions. Barranca is almost always surrounded by either dense fog, blinding rain or below-freezing temperatures.
This agency is led by Geoff Carter (Cary Grant), who immediately orders one of these two pilots to go up for a delivery in the middle of the night, even after a thick fog has rolled in. This pilot promises to return in a few hours to have a nice steak dinner with Bonnie. The pilot goes up and has no immediate problems, but the weather gets worse as his flight continues. Carter orders him to turn around and make it back to base, but the fog is so thick now the pilot can't see anything out his window. Even after turning on their brightest lights at headquarters, he can't see anything.
So Carter and his best friend, Kid (Thomas Mitchell) head outside and begin listening for the hum of the planes' engine. They hook up the radios outside and use their hearing to tell the pilot how close he is to base. During this time, Carter tells the local bar to stop playing music and shut off all lights, being able to hear the engine to the south and telling him to head north.