The calculated distance (air line) between Azpeitia and Aretxabaleta is approximately 16 miles respectively 25 kilometers.
By car or train, the actual journey to Aretxabaleta is certainly longer, as only the direct route (as the crow flies) between Azpeitia and Aretxabaleta has been calculated here.
Air line (approximately)
25 kilometers
14 nautical miles