What Delta terminal at JFK? Delta Air Lines operates a major hub at John F. Kennedy International Airport (JFK) in New York City, predominantly using Terminal 4, which is a state-of-the-art facility designed to handle high volumes of international and domestic traffic. Terminal 4 is one of the busiest terminals at JFK and serves as a critical gateway for Delta’s extensive network of flights. The terminal underwent a significant renovation and expansion, completed in recent years, to accommodate the increasing demand for air travel and to enhance passenger experience. The facility boasts a modern design with a spacious layout, featuring a wide array of amenities and services tailored to the needs of travelers.