The calculated distance (air line) between Montigny-lès-Metz and Amnéville is approximately 11 miles respectively 18 kilometers.
By car or train, the actual journey to Amnéville is certainly longer, as only the direct route (as the crow flies) between Montigny-lès-Metz and Amnéville has been calculated here.
Air line (approximately)
18 kilometers
10 nautical miles