The calculated distance (air line) between Algete and Alcalá de Henares is approximately 11 miles respectively 17 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 Algete and Alcalá de Henares has been calculated here.
Air line (approximately)
17 kilometers
9 nautical miles