The calculated distance (air line) between Saint-Brice-sous-Forêt and Amiens is approximately 62 miles respectively 100 kilometers.
By car or train, the actual journey to Amiens is certainly longer, as only the direct route (as the crow flies) between Saint-Brice-sous-Forêt and Amiens has been calculated here.
Air line (approximately)
100 kilometers
54 nautical miles