The calculated distance (air line) between Rouen and Gournay-en-Bray is approximately 28 miles respectively 45 kilometers.
By car or train, the actual journey to Gournay-en-Bray is certainly longer, as only the direct route (as the crow flies) between Rouen and Gournay-en-Bray has been calculated here.
Air line (approximately)
45 kilometers
25 nautical miles