Delta Airlines, one of the biggest airlines in the world, has a major hub at Delta Airlines Hartsfield–Jackson Atlanta International Airport For both local and international flights, the airport serves as a hub, with several terminals and gates devoted to Delta. Handling a large number of Delta’s passengers, ATL is renowned for its efficiency and is frequently listed as one of the busiest airports in the world. Being a major participant in the airline’s vast network and helping to establish ATL as a major hub for international travel, Delta operates direct flights to hundreds of locations.