The calculated distance (air line) between Bochum-Hordel and Leopoldsburg is approximately 87 miles respectively 141 kilometers.
By car or train, the actual journey to Leopoldsburg is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Leopoldsburg has been calculated here.
Air line (approximately)
141 kilometers
76 nautical miles