Red Eye (2005)

Lisa Reisert hates to fly, but the terror that awaits her on the night flight to Miami has nothing to do with a fear of flying. Moments after takeoff, her seatmate, Jackson, reveals the real reason he's on board: he is an operative in a plot to kill a rich and powerful businessman and Lisa is the key to its success. If she refuses to cooperate, her own father will be killed by an assassin awaiting a call from Jackson. Trapped within the confines of a jet at 30,000 feet, Lisa has nowhere to run and no way to summon help without endangering her father, her fellow passengers and her own life.

Official website: http://www.redeye-themovie.com/