Continuity mistake: Near the end of the movie, when Grant takes control of the airplane and lands on his second try, you can see the inner engine on the left wing (right to us) fall off and catch fire after impacting with the smaller parked planes. In the next shot, which happens quickly, you can see the engine is still in place and not damaged at all. In the next shot, it's gone again and the wing is on fire where the engine was.
Continuity mistake: The second time David Grant (Kurt Russell) is calling the stewardess on the phone he keeps pressing the button. The movie makes it seem like every time he presses the button, the light blinks. You can clearly see him stop pressing the button but the light still blinks.