Berlin Tegel Airport is notable for its hexagonal main terminal building around an open square, which makes walking distances as short as from the aircraft to the terminal exit. The airport was scheduled to close in June 2012 after Berlin Brandenburg Airport (BER) opened, but due to ongoing delays with BER, the future of Tegel is uncertain. A campaign was launched to keep Tegel Airport open, which gathered signatures for a referendum for voters to decide on the future of the airport. While the referendum was non-binding, it did result in a majority of votes cast in favor of keeping Tegel open and
Berlin Tegel Airport with the airline's transatlantic services at the latter airport, Pan Am withdrew its non-stop Tegel–JFK service at the end of the summer timetable, in October of that year. Following the cessation of direct Tegel–New York City scheduled services, Pan Am continued to operate affinity group/Advance Booking Charter (ABC) flights from Tegel to the US on an "ad hoc" basis. From the start of the 1974–75 winter season, Pan Am began operating a series of short- and medium-haul week-end charter flights from Tegel under contract to a leading West German tour operator. These flights served popular resorts in the Alpine region