This apartment has excellent transport connections. An underground station is opposite and two key railway stations are just 2km away. Taxi charges for around the city are reasonable.
Berlin Brandenburger Airport: 1 hr S/U-bahn or 30 minutes Deutsch Bahn Express regional trains.
The Airport-Express is now FEX
The airport express (short: FEX, formerly Airport-Express) connects the airport and Berlin’s city centre. On this regional train, the standard VBB fare (Berlin ABC) applies and the whole trip, from the "Flughafen BER – Terminal 1-2" stop to Berlin’s central station, takes approx. half an hour. Please note: FEX does not stop a the "Flughafen BER – Terminal 5" station.
Excellent rail connections to the city centre and surroundings
During peak times, 6 S-Bahn trains per hour (lines S45 or S9) stop at BER, reaching the new airport approx. every 10 minutes. These trains arrive from Südkreuz or Spandau station via the "Flughafen BER – Terminal 5" stop and the new Waßmannsdorf stop to the "Flughafen BER – Terminal 1-2" station.
The FEX leaves Berlin Central Station twice every hour, while regional services (RE7, RB22 and RB14) stop at the airport 7 times per hour. Further connections include the long-distance IC17 from Warnemünde via Berlin Central Station and Südkreuz resp. the service from the opposite direction (Dresden) every two hours.
Here is a good link to view all Berlin Brandenbury Airport travel options. https://sbahn.berlin/en/plan-a-journey/information-for-berlin-visitors/berlins-berlin-brandenburg-ber-airport/?acc=a20714-t1