The calculated distance (air line) between Aulnoy-lez-Valenciennes and Metz is approximately 145 miles respectively 233 kilometers.
By car or train, the actual journey to Metz is certainly longer, as only the direct route (as the crow flies) between Aulnoy-lez-Valenciennes and Metz has been calculated here.
Air line (approximately)
233 kilometers
126 nautical miles