When Katie and Marcy arrive at the airport to meet the prince, they leave their car parked at the terminal entrance. This would never happen in reality. Any major airport only allows loading and unloading. Any vehicle parked would be immediately towed.
Although the story is supposedly set in New York, when Katie and Marcy get out of their car at the airport, the Calspan Air Services facility located at Niagara Falls International Airport is in the background, with the company's name and logo clearly visible on the side of the building.