The calculated distance (air line) between Franconville and Montigny-lès-Cormeilles is approximately 2 miles respectively 2 kilometers.
By car or train, the actual journey to Montigny-lès-Cormeilles is certainly longer, as only the direct route (as the crow flies) between Franconville and Montigny-lès-Cormeilles has been calculated here.
Air line (approximately)
2 kilometers
1 nautical miles