Busiest airspace and busiest airport are two different things, technically.
The airspace that combines JFK, LaGuardia, and Newark, is the busiest airspace in the US.
It's a crazy airspace. Add to that Teterboro, 12 miles from NYC and Republic ~20 miles from NYC, along with all the heliports on the Hudson.
It's a crazy airspace. Add to that Teterboro, 12 miles from NYC and Republic ~20 miles from NYC, along with all the heliports on the Hudson.