And don't forget, airports all have to be on the edge of town anyway. So even if you're not in a small town, you're taking a train or a bus or a cab to the airport.
Meanwhile, big train and bus terminals can exist in the dead center of town. I can walk to the Empire State Building from Union Station in New York. But even one time, Gilbert Godfried suggests a picking up a connecting flight at the Twin Towers and everyone yells at him.
