The calculated distance (air line) between Bois-des-Filion and Longueuil is approximately 17 miles respectively 28 kilometers.
By car or train, the actual journey to Longueuil is certainly longer, as only the direct route (as the crow flies) between Bois-des-Filion and Longueuil has been calculated here.
Air line (approximately)
28 kilometers
15 nautical miles