The calculated distance (air line) between Les Clayes-sous-Bois and Croissy-sur-Seine is approximately 8 miles respectively 13 kilometers.
By car or train, the actual journey to Croissy-sur-Seine is certainly longer, as only the direct route (as the crow flies) between Les Clayes-sous-Bois and Croissy-sur-Seine has been calculated here.
Air line (approximately)
13 kilometers
7 nautical miles