Transferring at John F. Kennedy International Airport (JFK) in 2026 is a variable process that depends heavily on whether you must change terminals. For an intra-terminal transfer (e.g., connecting from one Delta flight to another in Terminal 4), you should allow at least 60 to 90 minutes. However, if your connection requires an inter-terminal transfer via the AirTrain (e.g., Terminal 1 to Terminal 8), you should budget a minimum of 3 hours. This is because you must exit the secure area, ride the AirTrain, and clear TSA security again at the new terminal. For international-to-domestic transfers, you must also clear U.S. Customs and Border Protection, which can add 30–60 minutes depending on your eligibility for Global Entry or Mobile Passport Control. Ongoing construction for the "New Terminal One" project can also cause intermittent delays in AirTrain service or pedestrian walkways, so checking real-time wait times on the official JFK website or app before landing is highly recommended to avoid missing your onward flight.