The calculated distance (air line) between Metz and Asnières-sur-Seine is approximately 177 miles respectively 284 kilometers.
By car or train, the actual journey to Asnières-sur-Seine is certainly longer, as only the direct route (as the crow flies) between Metz and Asnières-sur-Seine has been calculated here.
Air line (approximately)
284 kilometers
154 nautical miles