Until the completion of the long awaited Berlin-Brandenburg Airport there are two main airports serving Tegel Airport or Schönefeld Airport. Most of the major international airlines arrive through Tegel Airport (TXL) while Schönefeld Airport (SXF) serves many of the discount airlines including easyJet, Ryanair and Norwegian.
Tegal Airport is located in Zone B of the Berlin public transit system so you will just need a zone AB ticket will get you right into central Berlin. See our page on fares for more information on fares and the different zones.
One of the best options for getting from Tegal to central Berlin is either the X9 or TXL express bus operated by BVG.
The TXL Express bus goes to Alexanderplatz stopping at Hauptbahnhof, Brandenburg Gate and the intersection of Unter den Linden and Friedrichstraße. Travel time is 22 minutes to Hauptbahnhof and 39 minutes to Alexanderplatz.
The X9 Express bus goes to Zoologischer Garten on the west side of the city centre making only 6 stops. Travel time is only 20 minutes to Hauptbahnhof and 39 minutes to Alexanderplatz.
You can catch either of the above buses on the upper level of the airport ringroad. The TXL stop is right by the main doors to Terminal A. while the X9 stop is just around the corner. Both buses run every 10 minutes during the day and every 20 minutes at night.
There is no train service terminating at Tegal Airport. If you are travelling from Berlin back to the airport, do not confuse Tegal Station on the S-Bahn with the airport. It is not joined to the airport in any way, but is simply a suburban station in a neighbourhood that goes by the same name.
Schönefeld Airport is in Fare Zone C, so you will need an ABC ticket to travel into the city centre. See our page on fares for more information on fares and the different zones.
S-Bahn + U-Bahn: Schönefeld Airport is connected to the S-Bahn. The S9 and S45 depart every 20 minutes so you shouldn't have to wait more than 10 minutes for one or the other. The S45 runs along a portion of the Ringbahn that cirles the centre of Berlin. You can transfer to other S-Bahn Trains such as S8 or S7 U-Bahn lines U4, U6, U7, U8, or U9 at different stations along your route. You can also transfer at Südkreuz to and S-Bahn train that runs through the city centre via the north-south tunnel.
X7 Express + U-Bahn: The X7 Express Bus offers the the quickest connection to the U-Bahn with the travel time taking only 7 minutes to Rudow Station on the U7 Line. From there you can get to Central Berlin, but you will have to transfer to another train along the way depending on your final destination. Total travel time on the U-Bahn not including station waits is about 35 minutes to the east side near the Alexanderplatz TV Tower or about 45 minutes to the west side near the Zoo. The X7 Express Bus runs every 10 minutes during the day and every 20 minutes at night.
Regional Trains: There are two Regional Trains that will get you into the city centre a bit quicker than the above options. Both the RE7 or RB14 Lines operate between Schönefeld Airport and several major train stations in Central Berlin. Travel time is about 25 to 35 minutes depending on your destination. Between the two lines there are 2 departures every hour beginning at 5am and ending at 11:30pm. While the time advantage is not huge, it is nice that you can get into Central Berlin without changing trains along the way making this option well worth considering. You can get more information about the regional trains from the VBB website.
Official Website: http://www.bvg.de/en/