The calculated distance (air line) between Dallgow-Döberitz and Teltow is approximately 13 miles respectively 21 kilometers.
By car or train, the actual journey to Teltow is certainly longer, as only the direct route (as the crow flies) between Dallgow-Döberitz and Teltow has been calculated here.
Air line (approximately)
21 kilometers
11 nautical miles