The calculated distance (air line) between Oststeinbek and Hummelsbüttel is approximately 9 miles respectively 14 kilometers.
By car or train, the actual journey to Hummelsbüttel is certainly longer, as only the direct route (as the crow flies) between Oststeinbek and Hummelsbüttel has been calculated here.
Air line (approximately)
14 kilometers
8 nautical miles