The calculated distance (air line) between Bochum-Hordel and Helchteren is approximately 83 miles respectively 134 kilometers.
By car or train, the actual journey to Helchteren is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Helchteren has been calculated here.
Air line (approximately)
134 kilometers
72 nautical miles