The calculated distance (air line) between Pinar de Chamartín and Alcalá de Henares is approximately 16 miles respectively 26 kilometers.
By car or train, the actual journey to Alcalá de Henares is certainly longer, as only the direct route (as the crow flies) between Pinar de Chamartín and Alcalá de Henares has been calculated here.
Air line (approximately)
26 kilometers
14 nautical miles