The calculated distance (air line) between Saint-Jean-de-Luz and Atarrabia is approximately 39 miles respectively 62 kilometers.
By car or train, the actual journey to Atarrabia is certainly longer, as only the direct route (as the crow flies) between Saint-Jean-de-Luz and Atarrabia has been calculated here.
Air line (approximately)
62 kilometers
33 nautical miles