The calculated distance (air line) between Noisy-le-Roi and Saint-Quentin-en-Yvelines is approximately 5 miles respectively 9 kilometers.
By car or train, the actual journey to Saint-Quentin-en-Yvelines is certainly longer, as only the direct route (as the crow flies) between Noisy-le-Roi and Saint-Quentin-en-Yvelines has been calculated here.
Air line (approximately)
9 kilometers
5 nautical miles