You may be surprised to know that Airplane was not based on Airport. It was a copy of the 1957 movie Zero Hour. Some scenes almost exactly the same with, of course, the obvious exception of one being serious and one a comedy.
Not sure if links are allowed but here is a video comparison.
https://youtu.be/8-v2BHNBVCs?si=d-fvZZn7rF4teVJz