The calculated distance (air line) between Bonchamp-lès-Laval and Rouen is approximately 125 miles respectively 202 kilometers.
By car or train, the actual journey to Rouen is certainly longer, as only the direct route (as the crow flies) between Bonchamp-lès-Laval and Rouen has been calculated here.
Air line (approximately)
202 kilometers
109 nautical miles