Is much better than it has any right to be
I am a big fan of the Airport film series and Airport 77 is my favorite. I know Academy Award winning Airport is the flagship of the series and is very good but I still like this best.
Airport 1975 was very good visually (the in air transfer) but besides Charlton Heston, Karen Black and George Kennedy it had a Hollywood Squares type feel cast wise. The Concorde- Airport 79 was a disaster.
This film has an excellent cast with quite a few Academy Award winners. The disaster and rescue were very good visually and still hold up well. And that was before CGI. I love Lee Grant in this and she does not have a lot a screen time as do almost all the cast. If it had not been for the caliber of cast I think it would have been a completely different movie. The roles were not all substantial but with the great cast it was a much better film than one would have expected.