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