The calculated distance (air line) between Bad Salzdetfurth and Bochum-Hordel is approximately 127 miles respectively 204 kilometers.
By car or train, the actual journey to Bochum-Hordel is certainly longer, as only the direct route (as the crow flies) between Bad Salzdetfurth and Bochum-Hordel has been calculated here.
Air line (approximately)
204 kilometers
110 nautical miles