The calculated distance (air line) between Gasteiz / Vitoria and San Sebastián de los Reyes is approximately 166 miles respectively 267 kilometers.
By car or train, the actual journey to San Sebastián de los Reyes is certainly longer, as only the direct route (as the crow flies) between Gasteiz / Vitoria and San Sebastián de los Reyes has been calculated here.
Air line (approximately)
267 kilometers
144 nautical miles