The calculated distance (air line) between Neugraben-Fischbek and Dortmund is approximately 168 miles respectively 270 kilometers.
By car or train, the actual journey to Dortmund is certainly longer, as only the direct route (as the crow flies) between Neugraben-Fischbek and Dortmund has been calculated here.
Air line (approximately)
270 kilometers
146 nautical miles