The calculated distance (air line) between Camarma de Esteruelas and Tres Cantos is approximately 18 miles respectively 29 kilometers.
By car or train, the actual journey to Tres Cantos is certainly longer, as only the direct route (as the crow flies) between Camarma de Esteruelas and Tres Cantos has been calculated here.
Air line (approximately)
29 kilometers
16 nautical miles