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.
Factual errors: 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."
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.
Errors in geography: When the Arab's hotel bill is presented to Carson, the itemized monetary amounts are shown with the very American decimal point. In German, euros and eurocents would be separated by a comma.
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.
Factual errors: 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.