Public transportation system of Berlin
For information regarding the public transportation system of berlin please see the following links:
If you travel one way in the fare zones A and B, a two hour "single ticket Berlin AB" or a "single ticket Berlin BC" respectively for 2.70 € is advised. Otherwise, a "day ticket Berlin AB" for 6.90 € would be an uncomplicated alternative.
An overwiev of the available tickets and their corresponding conditions can be found here.