The calculated distance (air line) between Franconville and Saint-Brice-sous-Forêt is approximately 6 miles respectively 9 kilometers.
By car or train, the actual journey to Saint-Brice-sous-Forêt is certainly longer, as only the direct route (as the crow flies) between Franconville and Saint-Brice-sous-Forêt has been calculated here.
Air line (approximately)
9 kilometers
5 nautical miles