The calculated distance (air line) between Saint-Cyr-sur-Loire and Saint-Quentin-en-Yvelines is approximately 113 miles respectively 183 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 Saint-Cyr-sur-Loire and Saint-Quentin-en-Yvelines has been calculated here.
Air line (approximately)
183 kilometers
99 nautical miles