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United Airlines ATL Terminal+1-888-839-0502 One of the busiest airports in the world, Hartsfield-Jackson Atlanta International Airport United Airlines ATL Terminal, is home to United Airlines' North Terminal. United passengers can check in at the self-service kiosks or specialized counters on the North Side of the Domestic Terminal. Depending on the route, flights usually take off from Concourse T or Concourse A. visit us : https://www.airportsterminalinfo.com/united-airlines/united-airlines-atl-terminal-hartsfield-jackson-atlanta-international-airport/