The calculated distance (air line) between Zaragoza and San Sebastián de los Reyes is approximately 162 miles respectively 261 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 Zaragoza and San Sebastián de los Reyes has been calculated here.
Air line (approximately)
261 kilometers
141 nautical miles