What Terminal is Delta Airlines at PIT. Delta Airlines is located in Concourse D of Pittsburgh International Airport's (PIT) Airside Terminal. This concourse provides convenient access to both domestic and selected international destinations. Delta passengers can take advantage of a variety of services prior to boarding, including as dining, shopping, and relaxation facilities. The gates are easy accessible, with adequate of signage to direct tourists. PIT's concourses are well-connected with a shuttle service, allowing travelers to easily navigate between terminals. Always check the flight schedule for the most recent gate information.