The Airport Express runs on a new direct route from Berlin Central Station via Berlin Potsdamer Platz and Berlin Südkreuz to BER Airport. From the previous stop at Ostkreuz, lines RB24 and RB32 will run to BER Airport (see there), and from Gesundbrunnen, S-Bahn trains can be used to Potsdamer Platz and from there the FEX.

The FEX runs almost around the clock, approximately every 15 minutes between 4 a.m. and 1 a.m. The journey time between Südkreuz and BER is approximately 15 minutes. Together with the RE20, five train pairs per hour will be offered between Berlin Central Station/Potsdamer Platz/Südkreuz and BER. To improve the integration of the FEX into city transport, the line will run on the Berlin city railway during night service.

This line is a new service in connection with the second phase of the Elbe-Spree network. The RE20 now runs hourly between Berlin Central Station and Lübbenau from approximately 4 a.m. to 9 p.m. Stops along the way include Berlin Potsdamer Platz, Südkreuz, BER Airport, Königs Wusterhausen, and Lübben. The journey time between BER and Lübbenau is approximately 50 minutes. Due to the Lübbenau–Cottbus line still being single-track, the 2026 timetable only allows for single journeys on the RE20 line to/from Cottbus with a stop in Vetschau. According to the current planning status, the first three trips in the morning will start in Cottbus and in the afternoon, trains departing from Berlin between 5 p.m. and 8 p.m. will travel to Cottbus.

The RE20 line replaces and expands the previous RE2 shuttle services to provide hourly, daily service. Together with the RE2 and RE7 lines, there will be three trips per hour between Lübbenau and Berlin, now even daily and throughout the day.

The RB22 line continues to run hourly from Potsdam via Golm and BER Airport to Königs Wusterhausen. The state capital Potsdam therefore remains directly connected to BER Airport. In Königs Wusterhausen, there are connections to and from the RE2 towards Lübben, Lübbenau, and Cottbus. Travel times also remain unchanged.

The previously divided RB24 line will now be combined into a single line. It runs from Eberswalde via Berlin Ostkreuz and BER Airport to Blankenfelde and Wünsdorf-Waldstadt, but due to construction work, almost all journeys on this line must already begin and end in Blankenfelde (TF). The line runs daily from approximately 3 a.m. to 10 p.m. at hourly intervals, with additional night services on weekends between BER Airport and Wünsdorf-Waldstadt.

Together with the RB32 line, two connections per hour are offered directly to Terminals 1+2 at BER Airport from the stops Berlin-Hohenschönhausen, Berlin-Lichtenberg, Berlin Ostkreuz, and Berlin-Schöneweide. Regional trains no longer stop at Schönefeld station (near Berlin).

The previously divided RB32 line will now be combined into a single line. It will run from Oranienburg via Berlin Ostkreuz and BER Airport to Ludwigsfelde. The line will run daily from approximately 4 a.m. to 10 p.m. every hour from Oranienburg via Berlin Ostkreuz and BER Airport to Ludwigsfelde, plus a night service around midnight from Ludwigsfelde to BER Airport and back. Due to the construction-related diversion of the RE6 line via Oranienburg, the RB32 line is expected to run only between Berlin-Lichtenberg and Ludwigsfelde until February 8, 2026.

Together with the RB24 line, two connections per hour will be offered directly to Terminals 1+2 at BER Airport from the Berlin-Hohenschönhausen, Berlin-Lichtenberg, Berlin Ostkreuz, and Berlin-Schöneweide stops. Regional trains no longer stop at Schönefeld station (near Berlin).

From December 14, 2025, the S85 line will run to BER, providing a daily connection every 20 minutes between the airport, the eastern S-Bahn ring, and Wittenau–Frohnau (Monday to Friday) or Pankow (on weekends). 

The S9 line connects BER Airport with southeast Berlin and the city center every 20 minutes throughout the day, continuing on to Spandau. The S9 also operates at night on weekends, providing connections from BER to Berlin's night network with other S-Bahn trains, U-Bahn trains, trams, and buses.

The RVS bus line 263 connects the Grünau S-Bahn station (S46, S8) with BER Airport every hour during the day.

The RVS PlusBus 735 connects the city of Königs Wusterhausen with Wildau, the A10 Center, Miersdorf, and Schulzendorf with BER Airport daily—every hour from Monday to Friday and every two hours on weekends. Together with line 736, this creates a double service offering.

The RVS PlusBus 736 connects the city of Königs Wusterhausen with Wildau, Miersdorf, and Schulzendorf to BER Airport daily—every hour from Monday to Friday and every two hours on weekends. Together with line 735, this creates a double service offering.

The BER2 line (“AirportShuttle”) starts at Potsdam Central Station, also stops at the Stern-Center and Europarc Dreilinden, in the centers of Kleinmachnow, Stahnsdorf, and Teltow, and takes a fast route to BER Airport. Departure times are adjusted to peak demand times – on average, a bus runs every 1-2 hours from 3 a.m. to 11 p.m. A surcharge on top of the VBB fare or Deutschlandticket is required, which is paid when boarding.

Between midnight and early morning, BVG and RVS night bus routes provide continuous arrival and departure options at BER:

Bus N7 connects Rudow underground station (U7) with BER every night. On weeknights when there is no underground night service, it runs the entire U7 route between Rathaus Spandau and Rudow.

Bus N7X also runs on weeknights from S+U Zoologischer Garten via U Berliner Str. and S Schöneberg directly to BER Airport with few stops.

Bus N36 operated by RVS connects BER Airport with Schulzendorf, Miersdorf, Wildau, Königs Wusterhausen, and Mittenwalde every night.

Bus lines 600 and 743 connect the surrounding area with BER Airport on a daily basis – where there are no direct train connections:

Bus 600 connects Teltow (RE3, S25, S26) with Großbeeren and Waßmannsdorf: Monday to Friday hourly, every 2 hours on weekends.

Bus 743 connects Berlin-Lichtenrade (S2) with Großziethen and Waßmannsdorf: Monday to Saturday every 20 minutes, hourly in the evenings and on Sundays.

At the Waßmannsdorf S-Bahn station, there are connections to the S-Bahn S85 and S9, with only one stop to BER Airport.