The calculated distance (air line) between Bochum-Hordel and Zulte is approximately 166 miles respectively 268 kilometers.
By car or train, the actual journey to Zulte is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Zulte has been calculated here.
Air line (approximately)
268 kilometers
144 nautical miles