The calculated distance (air line) between La Celle-Saint-Cloud and Le Mesnil-le-Roi is approximately 6 miles respectively 10 kilometers.
By car or train, the actual journey to Le Mesnil-le-Roi is certainly longer, as only the direct route (as the crow flies) between La Celle-Saint-Cloud and Le Mesnil-le-Roi has been calculated here.
Air line (approximately)
10 kilometers
5 nautical miles