Which Sci-fi movie is this scene from?

[guyburns]

As a young lad many years ago in the 1960s, maybe 70s, I saw a time-travel movie that had a scene that is still vivid. I probably saw it on TV in B&W.

The scene I remember has a person, possibly sitting in a plane, waiting on an airstrip. They're waiting for the past version of themselves to catch up, and then they're going to join with it and continue their normal life. That's all I remember – and that memory may not be reliable. I'd like to find out the title, buy the movie, and watch it again.

Anyone know what film that scene might have been in?