The calculated distance (air line) between Fond du Sac and Quartier Militaire is approximately 14 miles respectively 22 kilometers.
By car or train, the actual journey to Quartier Militaire is certainly longer, as only the direct route (as the crow flies) between Fond du Sac and Quartier Militaire has been calculated here.
Air line (approximately)
22 kilometers
12 nautical miles