The calculated distance (air line) between Valladolid and San Sebastián de los Reyes is approximately 95 miles respectively 153 kilometers.
By car or train, the actual journey to San Sebastián de los Reyes is certainly longer, as only the direct route (as the crow flies) between Valladolid and San Sebastián de los Reyes has been calculated here.
Air line (approximately)
153 kilometers
83 nautical miles