The calculated distance (air line) between Pinar de Chamartín and Alcobendas is approximately 5 miles respectively 8 kilometers.
By car or train, the actual journey to Alcobendas is certainly longer, as only the direct route (as the crow flies) between Pinar de Chamartín and Alcobendas has been calculated here.
Air line (approximately)
8 kilometers
4 nautical miles