The calculated distance (air line) between La Chapelle-Saint-Mesmin and Saint-Quentin-en-Yvelines is approximately 62 miles respectively 99 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 La Chapelle-Saint-Mesmin and Saint-Quentin-en-Yvelines has been calculated here.
Air line (approximately)
99 kilometers
54 nautical miles