Was the "Northwest" in North by Northwest the first example of product placement?

One commenter thinks it is perhaps so. You see the red tail when Carey Grant and Leo G. Carroll are headed for a plane from Midway to Rapid City. I don't know whether the coincidence of the airline name (actually Northwest Orient at the time) and the movie title was intentional or not.

I did forget to list NW among airlines. It is funny, because I think after United I have flown on it more than any other. There must have been a traumatic experience that made me want to forget....