The calculated distance (air line) between Saint-Valery-en-Caux and Le Mans is approximately 131 miles respectively 211 kilometers.
By car or train, the actual journey to Le Mans is certainly longer, as only the direct route (as the crow flies) between Saint-Valery-en-Caux and Le Mans has been calculated here.
Air line (approximately)
211 kilometers
114 nautical miles