The calculated distance (air line) between Les Clayes-sous-Bois and Élancourt is approximately 3 miles respectively 5 kilometers.
By car or train, the actual journey to Élancourt is certainly longer, as only the direct route (as the crow flies) between Les Clayes-sous-Bois and Élancourt has been calculated here.
Air line (approximately)
5 kilometers
3 nautical miles