Next Week, on "Mad Men" (A Brief Post)

Explain to us the logic behind an airport buying time to advertise on the radio. Not an airLINE, mind you, or even an aireDALE, but an airPORT. Does anybody make travel plans based on commercials? "Oh, Kennedy is MUCH closer to my destination, and the flight into JFK costs $50 less. . . but LaGuardia has such a catchy jingle!"