The calculated distance (air line) between Meco and San Agustín del Guadalix is approximately 17 miles respectively 28 kilometers.
By car or train, the actual journey to San Agustín del Guadalix is certainly longer, as only the direct route (as the crow flies) between Meco and San Agustín del Guadalix has been calculated here.
Air line (approximately)
28 kilometers
15 nautical miles