The calculated distance (air line) between Bochum-Hordel and Rodenkirchen is approximately 43 miles respectively 69 kilometers.
By car or train, the actual journey to Rodenkirchen is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Rodenkirchen has been calculated here.
Air line (approximately)
69 kilometers
37 nautical miles