The calculated distance (air line) between Moncloa-Aravaca and San Fernando de Henares is approximately 11 miles respectively 17 kilometers.
By car or train, the actual journey to San Fernando de Henares is certainly longer, as only the direct route (as the crow flies) between Moncloa-Aravaca and San Fernando de Henares has been calculated here.
Air line (approximately)
17 kilometers
9 nautical miles