The calculated distance (air line) between Oststeinbek and Großzschocher is approximately 180 miles respectively 289 kilometers.
By car or train, the actual journey to Großzschocher is certainly longer, as only the direct route (as the crow flies) between Oststeinbek and Großzschocher has been calculated here.
Air line (approximately)
289 kilometers
156 nautical miles