The calculated distance (air line) between Ludweiler-Warndt and Bochum is approximately 157 miles respectively 253 kilometers.
By car or train, the actual journey to Bochum is certainly longer, as only the direct route (as the crow flies) between Ludweiler-Warndt and Bochum has been calculated here.
Air line (approximately)
253 kilometers
137 nautical miles