At Hartsfield-Jackson Atlanta International Airport (ATL), Delta Air Lines operates its international flights primarily out of the Maynard H. Jackson Jr. International Terminal, which consists of Concourses E and F. While many international arrivals and departures take place at Concourse F—the most modern terminal with dedicated customs and immigration facilities—Concourse E is also heavily used for international traffic. It is important for passengers to note that Delta's domestic flights depart from all seven concourses (T, A, B, C, D, E, and F), so if you are connecting from a domestic flight to an international one, you can use the underground "Plane Train" to move between terminals without leaving the secure area. If you are starting your journey in Atlanta for an international flight, you should check in directly at the International Terminal (accessible via I-75 at Exit 239) rather than the Domestic Terminal to avoid a lengthy shuttle ride between the two sides of the airport.