The calculated distance (air line) between Monschau and Bochum-Hordel is approximately 77 miles respectively 124 kilometers.
By car or train, the actual journey to Bochum-Hordel is certainly longer, as only the direct route (as the crow flies) between Monschau and Bochum-Hordel has been calculated here.
Air line (approximately)
124 kilometers
67 nautical miles