The calculated distance (air line) between Bochum-Hordel and Koersel is approximately 88 miles respectively 141 kilometers.
By car or train, the actual journey to Koersel is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Koersel has been calculated here.
Air line (approximately)
141 kilometers
76 nautical miles