If you have planning to travel to New York City and looking for a cheap Airport to board your flight from, then for that you can go to LaGuardia Airport, which is cited in New York; it is mostly known to be the cheapest Airport and also one of the smallest Airport located nearby if you are looking for the cheapest Airport then this is the best option you can proceed with.
Or else you can also visit Kennedy Airport (JFK), which is around 15 miles away from Manhattan, located in the borough of Queens, as you can board international flights from this Airport if you are flying British Airway, Lufthansa, or Delta, for that you have to fly into JFK.