The calculated distance (air line) between Maizières-lès-Metz and Jarny is approximately 13 miles respectively 21 kilometers.
By car or train, the actual journey to Jarny is certainly longer, as only the direct route (as the crow flies) between Maizières-lès-Metz and Jarny has been calculated here.
Air line (approximately)
21 kilometers
12 nautical miles