The calculated distance (air line) between Alcobendas and Fuente el Saz is approximately 9 miles respectively 15 kilometers.
By car or train, the actual journey to Fuente el Saz is certainly longer, as only the direct route (as the crow flies) between Alcobendas and Fuente el Saz has been calculated here.
Air line (approximately)
15 kilometers
8 nautical miles