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