The calculated distance (air line) between Sainghin-en-Weppes and Rouen is approximately 111 miles respectively 179 kilometers.
By car or train, the actual journey to Rouen is certainly longer, as only the direct route (as the crow flies) between Sainghin-en-Weppes and Rouen has been calculated here.
Air line (approximately)
179 kilometers
97 nautical miles