The calculated distance (air line) between Lavelanet and Portet-sur-Garonne is approximately 47 miles respectively 75 kilometers.
By car or train, the actual journey to Portet-sur-Garonne is certainly longer, as only the direct route (as the crow flies) between Lavelanet and Portet-sur-Garonne has been calculated here.
Air line (approximately)
75 kilometers
40 nautical miles