The calculated distance (air line) between Griñón and Moncloa-Aravaca is approximately 17 miles respectively 27 kilometers.
By car or train, the actual journey to Moncloa-Aravaca is certainly longer, as only the direct route (as the crow flies) between Griñón and Moncloa-Aravaca has been calculated here.
Air line (approximately)
27 kilometers
15 nautical miles