Hartsfield–Jackson Atlanta International Airport ATL, known locally as Atlanta Airport, Hartsfield Airport, and Hartsfield–Jackson, is located seven miles south of the central business district of Atlanta, Georgia, United States. It has been the world's busiest airport by passenger traffic since 1998, and by number of landings and take-offs since 2005, serving 89 million passengers per year. The airport is a focus city for Southwest Airlines and is the primary hub of Delta Air Lines and Delta Connection partner ExpressJet; the Delta hub is the world's largest airline hub. Delta Air Lines flew 59.01% of passengers from the airport in February 2011, AirTran flew 17.76%, and ExpressJet flew 13.86%. The airport has 207 domestic and international gates.
Hartsfield–Jackson held its ranking as the world's busiest airport in 2011, both in passengers and number of flights, by accommodating 92 million passengers (252,000 passengers daily) and 923,991 flights. Many of the nearly one million flights are domestic flights from within the United States, where Atlanta serves as a major hub for travel throughout the Southeastern United States.
Hartsfield–Jackson International Airport has international service to North America, South America, Central America, Europe, Asia, and Africa. As an international gateway to the United States, Hartsfield–Jackson ranks seventh. The airport is located mostly in unincorporated areas in Fulton and Clayton counties; the city limits of Atlanta, College Park, and Hapeville extend to the airport grounds. The airport's domestic terminal is served by MARTA's Red/Gold rail line.