The calculated distance (air line) between Bon Accueil and Plaine Magnien is approximately 18 miles respectively 29 kilometers.
By car or train, the actual journey to Plaine Magnien is certainly longer, as only the direct route (as the crow flies) between Bon Accueil and Plaine Magnien has been calculated here.
Air line (approximately)
29 kilometers
16 nautical miles