John F. Kennedy International Airport
In southeastern Queens, on Jamaica Bay.
While the airport itself is considered to be open to all Kindred, the place abounds with Giovanni contacts, spies and even family members behind the gates. To date, the Giovanni have avoided making any grand claim of domain over the airport, but anything out of the ordinary going on there eventually makes it back to their ears through their network of agents. While this normally doesn't make much difference, it can be a tremendous asset to the Necromancers. For instance, if a shipment of contraband goes through JFK, the Giovanni would be more than likely to ask for a share, lest news of the information make it to a vigilant customs official's voice mail.
The Giovanni are very careful with Kennedy Airport not to bite off more than they can chew. Most of the time they work through proxies, ghouls and mortals, "losing" a cargo shipment for a Kindred who refuses to pay tribute or arranging a flight delay for a truculent Kindred so that his plane would land during daylight hours.
If a dedicated group of Kindred attempted to wrest the airport from the Giovanni's sphere of influence, it would be possible due to the restricted manpower of the Necromancers, but they might find themselves running afoul of problems elsewhere. Were the Giovanni to lose their influence at JFK, their power would be significantly inhibited. Their resources are already stretched to the limit, and by the time they were able to cultivate Newark or La Guardia, another Kindred or a consortium of vampires would likely already be there. Of course, that same principle applies to Kindred attempting to usurp Kennedy Airport from the Giovanni - unless they know that the Necromancers have put all their eggs in one basket and are attempting to cripple the Necroman cers, they'd probably face less opposition by pursuing influence at one of the other airports.
https://en.wikipedia.org/wiki/John_F._Kennedy_International_Airport