BER (Terminal 1-2) is connected by the Airport Express (FEX), regional trains, S-Bahn trains and some IC connections and bus connections from Berlin, Potsdam and the surrounding area. The airport railway station is located directly under Terminal 1. Terminal 5 (formerly Schönefeld station) continues to be served by the S-Bahn. This also provides a fast, regular connection between the terminals.
Specifically, there are the following connections:
- The Airport Express (FEX) runs every half hour between Berlin Central Station and BER Terminal 1-2. The trains take about half an hour and also stop in Berlin Gesundbrunnen and at Ostkreuz station. Together with the RE8 and RB23 lines, this means that there are fast connections between Berlin Hauptbahnhof or Ostkreuz and BER T1-2 four times an hour during the day.
- The RE8 runs hourly on the route Nauen <> Falkensee <> Berlin city centre <> BER airport; also every night.
- The RB23 runs hourly on the route Golm <> Potsdam <> Berlin city centre <> BER airport; in the evenings and at weekends only between Berlin and BER.
- Lines RE8, RB22, RB23, RB24 and RB32 also offer hourly direct connections to BER Terminal 1-2 from Potsdam, Königs Wusterhausen, Ludwigsfelde, Nauen, Falkensee and Wünsdorf-Waldstadt.
- The RB22 runs hourly on the route Potsdam <> Golm <> Ludwigsfelde-Struveshof <> BER Airport <> Königs Wusterhausen.
- The RB24 runs hourly on the route Wünsdorf-Waldstadt <> Airport BER <> further as line FEX to Berlin.
- The RB32 runs hourly on the route Ludwigsfelde <> Airport BER <> onwards as the FEX line to Berlin.
- From many other places in Brandenburg, BER can be reached with just one change in Berlin, Potsdam, Ludwigsfelde or Königs Wusterhausen.
- The S-Bahn lines S45 and S9 run from Schönefeld, BER's Terminal 5, via Waßmannsdorf to Terminal 1-2. The lines each run every 20 minutes, so that a total of 6 journeys are offered per hour.
- At the same time, the S-Bahn also makes it possible to change terminals every 10 minutes or so in just 8 minutes' travel time.
- The Intercity line Rostock-Berlin-Dresden stops at BER Airport Terminal 1-2 every two hours, thus connecting BER to the German long-distance transport network. From Elsterwerda and Doberlug-Kirchhain, the IC trains can also be used with VBB tickets.
- Lines RB24 (Berlin-Lichtenberg <> Airport BER - Terminal 5) and RB32 (Oranienburg <> Berlin-Lichtenberg <> Airport BER - Terminal 5) also stop at the station every hour.