Factual error: When the engine is shut down in the plane, the altimeter is shown spinning down wildly, indicating that the plane is diving at a speed of over 2000 feet per second, which is approximately 1200 miles per hour. Assuming that the plane wouldn't disintegrate at that speed (which it would), judging from the altitude at which the engine was cut, it would have taken less than 3 seconds for the plane to hit the ground.
Continuity mistake: At the beginning of the movie when the family drives to the lake to send Dad off on the plane the SUV has no tinted rear windows. When Dad finally flies off and you see the family pulling up to the house, you see that the SUV now has the factory tinted rear windows.
Plot hole: In the final scene of the movie, right after the big car pileup, it appears that everybody but the main characters disappear. Wouldn't you think that with such a major car pileup, there would be at least a few people outside their car wondering what was going on?