Roy Smith wrote:

If you're transiting the Class B east-west, NY Approach will often hand
you off to LGA Tower, and tower will bring you right over the top of the
airport at 1500. They'll tell you to fly directly over the runway
intersection. Heading west, LGA Tower will sometimes give you back to
NY Approach, or sometimes just hand you off directly to TEB Tower as you
cross the Hudson.

It seems strange the first time, but it actually makes a lot of sense.
Right over the top of the airport, all the traffic is at ground level,
safely below you. You get some good sight-seeing in too!

I understand that. My usual route from CDW to points south passes over EWR.
I'm a little surprised at the altitude, though. I've not looked at the
approach plates, but I'd have guessed that JFK's approaches from the north
would be an issue.

- Andrew