The calculated distance (air line) between Fuencarral-El Pardo and Alcorcón is approximately 12 miles respectively 19 kilometers.
By car or train, the actual journey to Alcorcón is certainly longer, as only the direct route (as the crow flies) between Fuencarral-El Pardo and Alcorcón has been calculated here.
Air line (approximately)
19 kilometers
10 nautical miles