The calculated distance (air line) between Hamburg-Mitte and Neu Wulmstorf is approximately 11 miles respectively 17 kilometers.
By car or train, the actual journey to Neu Wulmstorf is certainly longer, as only the direct route (as the crow flies) between Hamburg-Mitte and Neu Wulmstorf has been calculated here.
Air line (approximately)
17 kilometers
9 nautical miles