The calculated distance (air line) between Le Mesnil-Esnard and Saint-Quentin-en-Yvelines is approximately 59 miles respectively 96 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 Le Mesnil-Esnard and Saint-Quentin-en-Yvelines has been calculated here.
Air line (approximately)
96 kilometers
52 nautical miles