The calculated distance (air line) between Lekeitio and Aretxabaleta is approximately 23 miles respectively 37 kilometers.
By car or train, the actual journey to Aretxabaleta is certainly longer, as only the direct route (as the crow flies) between Lekeitio and Aretxabaleta has been calculated here.
Air line (approximately)
37 kilometers
20 nautical miles