The calculated distance (air line) between Gasteiz / Vitoria and Aretxabaleta is approximately 15 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 Gasteiz / Vitoria and Aretxabaleta has been calculated here.
Air line (approximately)
25 kilometers
13 nautical miles