Continuity: When Stephanie is handed the flashlight to check avionics, the lamp is above her hand. In the next shot, it is below her hand.
Continuity: After Kyle is knocked down by the Arab, she has a small gash on her cheek. When she's asking the stewardess later what part of the plane she searched, there is no sign of any injury. The gash resurfaces later.
Revealing mistakes: When the oxygen masks are hanging, the camera jostles to convey turbulence but the hanging oxygen masks hang stationary and don't move.
Continuity: When Kyle is banging on the captain's door to speak to him she has her boarding pass in her right hand. Two shots later her hand is empty.
Audio/visual unsynchronized: When the French person on the screen is finished speaking, she remains there even though another language is playing.
Continuity: When Carson is taking Kyle to the bathroom, they stop outside the restroom and she holds her hands up to have him unlock the cuffs. The camera then cuts to another angle, and her hands are down.
Miscellaneous: At one point Kyle is in the galley with most of the plane's crew (at least all the ones we've been introduced to) and its captain. The camera takes a rotating view of Kyle and at the end of its rotation on the left-hand side, the smallest bit of "untreated" green screen is visible.
Continuity: Early in the movie when Kyle is leaving with Julia her hair is in a tight bun with no wisps loose. In the taxi there are wisps of hair down, then at the airport her hair is back in the original (no mess) bun again.
Factual errors: The avionics computers shown in the film appear to be an array of Cray supercomputers in the circular configuration typically seen in a supercomputer lab. In reality, avionics computers are small, ruggedized embedded systems which are distributed throughout the plane. Avionics computing requires highly reliable redundant systems, not massive computing power.
Revealing mistakes: A shot of the cockpit shows 2 sets of engine instruments. When the aircraft is shown, it has 4 engines.
Errors made by characters (possibly deliberate errors by the filmmakers): Throughout the film, the characters refer to the passengers leaving the plane as "deboarding". In the airline industry, this is called "deplaning." Boarding a plane is called "enplaning."
Errors made by characters (possibly deliberate errors by the filmmakers): As the plane is speeding down the runway in Berlin, Kyle is seen buckling her seat belt and a flight attendant is walking down the aisle. Air travel regulations require that seat belts be fastened before aircraft taxiing. Flight crews are supposed to be seated and buckled in as well.
Factual errors: The PA at the airport in Berlin welcomes the passengers to "Berlin International airport". However, Berlin does not have one, but two international airports, Tegel and Schönefeld (and at the time of the movie, also Tempelhof), so the PA would have specified which one.
Continuity: A short while after the oxygen masks come down only a few masks are still hanging. The masks are gone and the trap doors they came out of are back up and closed.
Errors made by characters (possibly deliberate errors by the filmmakers): At the end of the film the plane makes an emergency landing in Newfoundland, Canada. For some reason the FBI is in charge at the airport. However, the RCMP has jurisdiction in Canada, not the FBI. Also, the FBI claim that they are holding the coroner in Berlin, but they have no jurisdiction in Germany.
Revealing mistakes: When you see the shot of the landing gear touching down on the runway on landing, notice the aircraft does not flare. (Flaring an aircraft means to bring the nose up on landing so that the main landing gear touches down first, then the nose gear. If a plane lands as shown in the movie, there is a risk of the landing gear collapsing, causing the aircraft to crash.)
Factual errors: Over the course of the movie, Kyle's search for her daughter takes us further and further into the various compartments and holds of the aircraft, eventually taking us into areas far beneath flight deck. The problem here is with the layout of the bowels of the aircraft. As shown, this airliner's computer room is large and cavernous, with much empty and unused space. In reality, virtually every square inch of any passenger liner has a purpose, and with the exception of passenger and crew areas, every other part of an airliner is unbelievably cramped, filled with cargo, electronics, hydraulics, or emergency equipment. Such a waste of space, as depicted in this film, simply wouldn't exist.