The calculated distance (air line) between Bochum-Hordel and Overpelt is approximately 79 miles respectively 126 kilometers.
By car or train, the actual journey to Overpelt is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Overpelt has been calculated here.
Air line (approximately)
126 kilometers
68 nautical miles