The calculated distance (air line) between Altsasu and Fuencarral-El Pardo is approximately 185 miles respectively 297 kilometers.
By car or train, the actual journey to Fuencarral-El Pardo is certainly longer, as only the direct route (as the crow flies) between Altsasu and Fuencarral-El Pardo has been calculated here.
Air line (approximately)
297 kilometers
160 nautical miles