The 737 in the flying scene was a 737-300 or later due to the hamster mouth opening on the engine intakes; however, the 737 0n the ground was an earlier 100 or 200 model due to the round air intakes.
Jack Messina who plays young Cal has dark eyes, but Ty Doran who plays him as a young adult has blue eyes.
When they return to the cockpit scene, mention is made of 'increasing speed to three hundred knots'. However, at one point the co-pilot mentions the storm catching up to them at 'five hundred miles an hour'.