The calculated distance (air line) between Bochum and Montigny-lès-Metz is approximately 171 miles respectively 276 kilometers.
By car or train, the actual journey to Montigny-lès-Metz is certainly longer, as only the direct route (as the crow flies) between Bochum and Montigny-lès-Metz has been calculated here.
Air line (approximately)
276 kilometers
149 nautical miles