The calculated distance (air line) between Prüm and Bochum-Hordel is approximately 95 miles respectively 153 kilometers.
By car or train, the actual journey to Bochum-Hordel is certainly longer, as only the direct route (as the crow flies) between Prüm and Bochum-Hordel has been calculated here.
Air line (approximately)
153 kilometers
83 nautical miles