The calculated distance (air line) between Saint-Girons and Castanet-Tolosan is approximately 41 miles respectively 66 kilometers.
By car or train, the actual journey to Castanet-Tolosan is certainly longer, as only the direct route (as the crow flies) between Saint-Girons and Castanet-Tolosan has been calculated here.
Air line (approximately)
66 kilometers
35 nautical miles