The calculated distance (air line) between Halstenbek and Neu Wulmstorf is approximately 12 miles respectively 19 kilometers.
By car or train, the actual journey to Neu Wulmstorf is certainly longer, as only the direct route (as the crow flies) between Halstenbek and Neu Wulmstorf has been calculated here.
Air line (approximately)
19 kilometers
10 nautical miles