The calculated distance (air line) between Bochum-Hordel and Bielefeld is approximately 69 miles respectively 111 kilometers.
By car or train, the actual journey to Bielefeld is certainly longer, as only the direct route (as the crow flies) between Bochum-Hordel and Bielefeld has been calculated here.
Air line (approximately)
111 kilometers
60 nautical miles