United Airlines flies in and out of Hartsfield-Jackson Atlanta International Airport, one of the major and most intense air travel gateway stations in America. Being the major U.S. carrier in ATL, the United Airlines Hartsfield-Jackson Atlanta International Airport offers flight services within, to, from, and in the country via ATL. With its main operation sites in Terminal T, it connects passengers going both ways into, out of, or through Atlanta without much hassle or inconvenience.