BER Airport – Terminal 1-2 station connects with Berlin Brandenburg Airport
BER Airport – Terminal 1-2 station (German: Bahnhof Flughafen BER – Terminal 1-2) and to be named Flughafen BER station from December 2023, is a railway station located under the main terminal of Berlin Brandenburg Airport, Germany serving its Terminals 1 and 2 while the older BER Airport – Terminal 5 station serves its Terminal 5. Most train services are operated by Deutsche Bahn, which provides long-distance and regional connections while S-Bahn Berlin offers suburban lines.History
Construction of the station began in 2007 and the construction of the tunnels was completed on 25 June 2009. The station was handed over to Deutsche Bahn on 30 March 2010 and has been electrified since 7 June 2011. The public clients agreed to pay a fixed price of 285 million euros, although the actual construction cost was well below that number.  While the airport itself was not in operation, empty trains were running through the tunnels to drive out humidity. DB ultimately sued the airport for damages due to the unused station. The station was opened for regular passenger traffic on 26 October 2020, a few days before opening of the airport.
The station is served by Berlin S-Bahn, Regional-Express and InterCity services. The station lies directly under the airport terminal and has six platforms. Two of these are terminating platforms for the S-Bahn lines S45 and S9. The Airport is connected with Berlin Hauptbahnhof (Berlin main station) by the RE 9 Airport Express, with a journey time of 29 minutes as well as slower regional and suburban connections. Upgrades on the Berlin Dresden railway will enable faster and more frequent RE and IC service some time in the 2020s.
Due to the closure of Terminal 5, the station will be renamed Flughafen BER station in December 2023, reflecting it is now the sole station serving the airport.Train services
The station is served by the following regular service(s):
Intercity services IC 17 Dresden – BER Airport – Berlin – Rostock – Warnemünde (every 2 hours)
Regional services FEX Berlin Hauptbahnhof – Berlin Gesundbrunnen – Berlin Ostkreuz – BER Airport
Regional services RE 8 Wismar – Schwerin – Ludwigslust – Wittenberge – Nauen – Berlin-Spandau – Berlin Hbf – Berlin Ostbf – Berlin Ostkreuz – BER Airport
Local services RB 22 Königs Wusterhausen – BER Airport – Ludwigsfelde-Struveshof – Golm – Potsdam
Local services RB 23 (Potsdam Golm – Potsdam –) Berlin-Charlottenburg – Berlin Hbf – Berlin Friedrichstraße – Berlin Alexanderplatz – Berlin Ostbf – Berlin Ostkreuz – BER Airport
S-Bahn services  BER Airport – Schöneweide – Neukölln – Südkreuz
S-Bahn services  BER Airport – Schöneweide – Ostbahnhof – Alexanderplatz – Hauptbahnhof – Westkreuz – Spandau