Raleigh-Durham International Airport has terminals 1 (Concourse A gates A1-A9 though only A5, A6, A7 and A8 are in use;[REF] there is no Concourse B) and 2 (Concourse C gates C1-C25, Concourse D gates D1-D20).
Southwest Airlines is currently the only airline operating out of Terminal 1; all other airlines operate out of Terminal 2 [REF].