A 35-minute layover at New York’s John F. Kennedy International Airport (JFK) is extremely risky and generally not recommended. While the "Minimum Connection Time" for some domestic-to-domestic flights on the same airline can be as low as 30 minutes, this assumes that your first flight lands exactly on time, a gate is immediately available, and you are seated at the front of the plane for a quick exit. JFK is one of the world's busiest airports; if you need to change terminals, you must use the AirTrain, which alone can take 15–20 minutes. Even if your connection is in the same terminal, boarding for your next flight typically closes 15 minutes before departure, meaning your "35-minute" window is actually only a 20-minute window. If your first flight is even slightly delayed, you will almost certainly miss your connection. Most travel experts advise a minimum of 90 minutes for domestic connections and at least 3 hours for international arrivals at JFK to account for potential delays, long walks between gates, and security re-screening.