The calculated distance (air line) between Saint-Quentin-en-Yvelines and Villepreux is approximately 4 miles respectively 6 kilometers.
By car or train, the actual journey to Villepreux is certainly longer, as only the direct route (as the crow flies) between Saint-Quentin-en-Yvelines and Villepreux has been calculated here.
Air line (approximately)
6 kilometers
3 nautical miles