When Nick Falzone is driving home, Generation X/Billy Idol's 'Dancing with Myself' song is playing on the radio. It first comes on whilst on the freeway, and and continues until he reaches his drive way, yet doesn't break in continuity when there's an obvious gap in driving.
When Nick dives into the snow during the bomb threat, he is shown rolling over as he lands on his back. When he is home watching himself on TV, however, the dive shown does not match the one he did earlier, as he is shown landing on his stomach.
Supermarkets in New York are not allowed to sell 'hard liquor', so Mary Bell should not have had three bottles of vodka in her shopping trolley.
In the scene where Russell works for the first time he gives some headings which are totally incorrect compared to the radar picture. He sends Continental on heading 060 which seconds later you see he is not flying. He also gives Delta "A steep left turn heading 090" when in fact Delta is already flying on heading 090 or maybe on heading 100 but still wouldn't be a steep turn at all.
When Russell Bell stands on the runway to feel the effect of wing tip vortices from a landing 747-400, he stands directly under the jet as it flies over head. Wing tip vortices roll off the tips of wings in a swirling motion and travel outward and downward. In reality, one would need to be positioned several feet outboard of the wing tips to feel the effect; farther if the airplane were higher. However, if a strong crosswind were to exist, in this instance from the right, it would cause a vortex to persist on the runway for an extended period of time. If strong enough, the vortex can be blown laterally across the runway towards the centerline, where Mr. Thornton's character was standing. Of course the landing attitude of the aircraft depicted in the movie did not indicate such a crosswind; however, the concept is not wholly impossible as implied by the aforementioned.
Standing in the path of a landing aircraft is legally impossible in the U.S.A. Not even airport personnel, with security clearance, are allowed on the runway of an aircraft. Any area, on the other side of the security fence, is being watched by security and a human body on a runway will stop all landings and takeoffs on the entire airport until the person(s) are apprehended and arrested.
Several three-letter airline codes appearing on the radar scopes are wrong, such as DTA for Delta (should be DAL), JTL for Continental Express (should be BTA), ALG for Allegheny (should be ALO).
At the beginning of the movie, when Ed is believed to "go down the pipes", his scope shows two Continental Airlines flights with the same number (COA1250), supposedly representing two different planes.
During the bomb scare, the police in the movie are supposed to be Nassau County Police. However, the lights on the police cars are blue and red. No Nassau County police car at the time of the movie (1999) had blue lights on it.
In the scene with the kids visiting the TRACON where they all work, a plane departs that doesn't call the controller and this ends up causing a near collision. The airport image on the radar scope is of Newark Liberty International (you can tell by the two lines running essentially North/South that represent the two parallel N/S runways 4L/22R and 4R/22L). However, when the scene changes to the actual plane on an actual runway departing North, you see it pass over simply the number "4" and then immediately over water. This can only be LaGuardia Airport as it is the only airport of the three in New York (JFK, LaGuardia, Newark) that has only one N/S runway (4/22 - both Newark and Kennedy have 4L/22R and 4R/22L and are marked with the "R" and "L" on them) and has water immediately to the north of it.
While Nick and Connie are driving to lunch, they drive past a building with a VIA (VIA Rail Canada, yellow letters on blue background) logo on it. VIA does not own any property in New York or New Jersey. The driving scene was shot in Canada.
During the bomb threat, Ross phones Sparta Airlines' base operations in Greensboro, South Carolina. There is no Greensboro in South Carolina - Greensboro is in North Carolina. However, there is a Greenville in South Carolina, which shares its airport with Spartanburg, South Carolina, which may be origin of the name "Sparta Airlines".