Continuity: When the fighter shoots and blows up the truck, there is a shot of the flight attendant (at that moment being strangled by Ray Liotta) sitting in the pilot's seat, looking over her shoulder. It cuts back to the pilot, then back to her being strangled again. Very, very choppy editing.

Factual error: In the shot where the lady passenger boards the Upper Deck to take her seat, she boards through an aft-facing straight staircase, located at the rear of the cabin. On the 747-200, which they were flying, the majority were equipped with circular staircases, and a few equipped with the aft-facing straight staircases, but in both cases, they were located in the front of the cabin, no exceptions.

Factual error: When a hole was blown out of the side of the plane, the stewardess is being pushed back by the wind. Surely she would have been sucked out of the plane due to the changes in air pressure?

Factual error: In the shot(s) where the flight attendant approaches the cockpit, it shows an emergency exit door located on the left hand side of the cabin, however on the 747-200, which they were flying, the emergency exit door is located after the cockpit door, and is approximately 1/4 the size as shown. The door shown belongs to a 747-300/400 upper deck door, located in the middle of the upper deck cabin.

Continuity: In the last scene it is raining, but when the camera shows the flight attendant right after the captain salutes her, the rain miraculously stops.

Continuity: In one scene the flight attendant goes into the cockpit alone and closes the door, then later in the same scene the door is open.

Factual error: During the scene where the plane flies into the storm, the oxygen masks drop from the ceiling and a voice is heard explaining how to use them. The masks should have dropped long before that, when the prisoner blew a hole in the side of the plane with his gun. The masks would have dropped as soon as the plane began decompressing.

Continuity: Near the end of the film when Lauren Holly is learning how to land the plane it is raining outside, but in several shots from the outside of the plane the camera pans up slightly...to reveal the jagged edge of the flight deck window. Now I'm no plane expert, but if the window was broken, she would be being pushed back by the force of air moving at 500mph. It seems it's only there so the shot of her is not distorted by the rain, but the camera leaves the jagged edge in the middle of the screen, so it doesn't even look like the camera is just inside the window.

Continuity: There is a scene where you look down the steps and there aren't any dead bodies, but in the next scene there is someone lying dead on the floor at the bottom of the steps.

Deliberate "mistake": In a lot of the shots in the cockpit, when Teri is attempting to begin taking control of the aircraft, notice the Horizontal Situation Indicator on the First Officer's side. The compass rose is moving around erratically - which would suggest that the 747 is also changing heading extremely erratically and robotically - which isn't possible.

Continuity: When Lauren Holly's character boards the plane she shows Catherine Hicks her bare, ringless hand, meaning that she broke up with her fiance. Two seconds later you see Lauren Holley in a galley-type closet thing taking off both her leather gloves.  There was absolutely no reason for her to have put the glove back on. 

Continuity: Very soon after that, when Ray Liotta is trying to grab the stewardess, we see a shot of the two of them on the floor, and the stewardess is clearly fiddling with the gun, trying to get the bullet in. Then in the next shot, her hand is further back, and she's reaching forward for the bullet again.

Factual error: The Flight Management Computer cannot land an aircraft automatically. It can perform arrivals into airports but only up to a specific point around the airport, after which point vectors are required to be lined up on an approach.

Factual error: When the plane decompresses from having a bullet fired through its skin, there are two major problems with this scene. First, there is no conceivable way that the hole could be sealed by placing a briefcase over it, as the stewardess does. Secondly, without an oxygen mask on, everybody on the plane, including the stewardess, would have fallen unconscious almost immediately - the first stages of hypoxia kick in within seconds. They would have regained consciousness as the plane descended below 10 000 feet, at which point the briefcase/seal would have been unnecessary.