The calculated distance (air line) between Chevreuse and Saint-Arnoult-en-Yvelines is approximately 10 miles respectively 17 kilometers.
By car or train, the actual journey to Saint-Arnoult-en-Yvelines is certainly longer, as only the direct route (as the crow flies) between Chevreuse and Saint-Arnoult-en-Yvelines has been calculated here.
Air line (approximately)
17 kilometers
9 nautical miles