The calculated distance (air line) between Bochum-Hordel and Oosterwolde is approximately 110 miles respectively 176 kilometers.
By car or train, the actual journey to Oosterwolde is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Oosterwolde has been calculated here.
Air line (approximately)
176 kilometers
95 nautical miles