Hmm. I don't know about that. My understanding is that contrails only (or mainly?) form at higher altitudes. Most of the traffic around a busy airport is low-altitude take-offs and landings. I live practically next door to a busy international airport and can't say I ever notice contrails, except for a few off in the distance around dusk.

I notice a lot more contrails when I'm out in rural "flyover country", but that might also just be because you typically get to see much more of the sky when you're out in the middle of nowhere.