The calculated distance (air line) between Bochum-Hordel and Montfoort is approximately 102 miles respectively 164 kilometers.
By car or train, the actual journey to Montfoort is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Montfoort has been calculated here.
Air line (approximately)
164 kilometers
89 nautical miles