The calculated distance (air line) between Bochum-Hordel and Hürth is approximately 46 miles respectively 73 kilometers.
By car or train, the actual journey to Hürth is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Hürth has been calculated here.
Air line (approximately)
73 kilometers
40 nautical miles