The calculated distance (air line) between Montigny-lès-Cormeilles and Metz is approximately 180 miles respectively 290 kilometers.
By car or train, the actual journey to Metz is certainly longer, as only the direct route (as the crow flies) between Montigny-lès-Cormeilles and Metz has been calculated here.
Air line (approximately)
290 kilometers
156 nautical miles