In memory of JFK! ...and so, my fellow Americans: ask not what your country can do for you—ask what you can do for your country. ~JFK (Inaugural Address January 20, 1961)
Si te ven con cara de turista te van a ofrecer cambiarte tu pase semanal / mensual del metro por una tarjeta para el AirTrain. Diles que no e ignóralos.
For JetBlueflights, spend the extra $$ on 'Even More Speed' pass. Especially during Spring break. Can save you at least an hour of security line waiting.
If it is insanely early or late at night and you are headed to Manhattan, a taxi is less expensive and quicker than normal. Typically I would recommend the train though. Super cheap.
Bad service for early morning flights. TSA doesn't re-open until 4:45 AM. Recommend that you arrive closer to your boarding time if you are taking a 6:00 AM flight out of JFK.
John F. Kennedy International Airport is the primary international airport serving New York City. It is the busiest international air passenger gateway into North America, the 14th-busiest airport in the world, and the sixth-busiest airport in the United States.