The calculated distance (air line) between Foix and Plaisance-du-Touch is approximately 44 miles respectively 71 kilometers.
By car or train, the actual journey to Plaisance-du-Touch is certainly longer, as only the direct route (as the crow flies) between Foix and Plaisance-du-Touch has been calculated here.
Air line (approximately)
71 kilometers
38 nautical miles