The calculated distance (air line) between Altona-Altstadt and Großzschocher is approximately 185 miles respectively 297 kilometers.
By car or train, the actual journey to Großzschocher is certainly longer, as only the direct route (as the crow flies) between Altona-Altstadt and Großzschocher has been calculated here.
Air line (approximately)
297 kilometers
161 nautical miles