The calculated distance (air line) between Bochum-Hordel and Zichem is approximately 101 miles respectively 162 kilometers.
By car or train, the actual journey to Zichem is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Zichem has been calculated here.
Air line (approximately)
162 kilometers
88 nautical miles