Air Florida flight 90 is a Boeing 737 throughout the movie, but the scene right before the impact shows instead a McDonnell Douglas DC-9.
Some close-up shots of the parked Boeing 737 in Miami show its registration as being N81AF. The real registration of the aircraft was N62AF, accurately depicted in the flight deck.
The Air Florida Boeing 737-200 aircraft should have 2 forward exit doors, 2 rear exit doors, and 2 overwing exits. This is evident in the exterior shots of the aircraft in Miami and is confirmed in the safety announcement given on the ground in Washington. However, all interior shots of the cabin show only one door, at the front left (the one that the passengers use to board). The places where the 3 other doors should be are replaced with either lavatories, a galley or closet spaces. Additionally, there appears to be no overwing exit (which would be clearly marked with red handles and a large "EXIT" sign).
When car passenger sees the plane approaching the bridge before the crash, it shows a DC-9 Style Aircraft, with no wing mounted engines and a large tail Horizontal Stabilizer, it is not a 737, the actual type of plane that crashed.
The tractor shown "pushing" the aircraft off the gate is a baggage tug, that would not have the weight or the power to move even an empty 737.
When flight 90 is being deiced, the tail of a 727 is shown, which has a T type tail. The 737 has a conventional tail.