JFK Airport is one of the busiest airports in the world as per its size, where over 59 million people are transported annually. Getting around this super busy airport can be a challenge unless you are prepared with a JFK Terminals Guide. At JFK Airport Delta Airlines uses terminal 2 and terminal 4 for providing their customer best services. You can directly contact the terminal staff at Delta Terminal JFK Airport if you have any query or confusion regarding your flight details and so on.