Always (1989) on Netflix

Pete is a pilot who drops water on forest fires at very low heights. His intended Dorinda is also a pilot who doubles as a radio controller for the pilots who do this work. Pete always takes chances, confident that his skill will bring him through. One day it doesn't and he is killed. He finds himself returning as an invisible ghost who's presence is barely felt giving advice to his successor. Pete then finds that his successor is also falling in love with Dorinda.