The calculated distance (air line) between Saint-Girons and Andorra la Vella is approximately 38 miles respectively 61 kilometers.
By car or train, the actual journey to Andorra la Vella is certainly longer, as only the direct route (as the crow flies) between Saint-Girons and Andorra la Vella has been calculated here.
Air line (approximately)
61 kilometers
33 nautical miles