The calculated distance (air line) between Rothenburgsort and Oststeinbek is approximately 5 miles respectively 9 kilometers.
By car or train, the actual journey to Oststeinbek is certainly longer, as only the direct route (as the crow flies) between Rothenburgsort and Oststeinbek has been calculated here.
Air line (approximately)
9 kilometers
5 nautical miles