The calculated distance (air line) between Bochum-Hordel and Dinslaken is approximately 19 miles respectively 31 kilometers.
By car or train, the actual journey to Dinslaken is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Dinslaken has been calculated here.
Air line (approximately)
31 kilometers
17 nautical miles