Nathan's Hot Dog of Coney Island.
At the area of Gate C at the airport, and I saw the Nathan's stand.
Their original hot dog for $ 2.99 is the one to buy, the same one as they have made for many years.
When you bite into the hot dog, you hear and feel the "snap" of the skin.
I like mine with sourkraut amd mustard.
Forget the other stuff on the menu. I see one Yelper did not know this.
FYI this area of the airport does not have much good things to eat.