The calculated distance (air line) between Bochum-Hordel and Iserlohn is approximately 24 miles respectively 39 kilometers.
By car or train, the actual journey to Iserlohn is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Iserlohn has been calculated here.
Air line (approximately)
39 kilometers
21 nautical miles