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