Near the end of the movie, the air traffic controller reports that the course of the missing aircraft is "Heading 420" There are only 360 degrees worth of compass headings.
Agent Blair's seat is 44A. She sits in the right hand side window seat. In real airliners the A seat is always on the left side.
At around 17 mins, on the flight deck, the captain is talking to the co-pilot about a previous flight, and is speaking about the co-pilot on that previous flight. He says, "He was sitting "right there in that jump seat, and said to me, "Do you want me to take [control of the aircraft] from here?"" One cannot control an aircraft from the jump seat. He meant the co-pilot's seat.
Near the end of the film the Ground Proximity Warning System (GPWS/EGPWS/TAWS) sounded with the words 'Too Low Gear'. Whilst this is a genuine GPWS/EGPWS/TAWS warning, they are all triggered in order of safety priority, meaning that 'Terrain Ahead' and 'Whoop Whoop Pull Up' would have sounded. The landing gear not being down and locked was of no importance to the situation the aircraft was in.
During various scenes the aircraft was shown in two different liveries. One was all white and the other was two shades of blue with the airline's name (Speedbird) added.