The calculated distance (air line) between Beasain and Gasteiz / Vitoria is approximately 28 miles respectively 44 kilometers.
By car or train, the actual journey to Gasteiz / Vitoria is certainly longer, as only the direct route (as the crow flies) between Beasain and Gasteiz / Vitoria has been calculated here.
Air line (approximately)
44 kilometers
24 nautical miles