The calculated distance (air line) between San Sebastián de los Reyes and Villa de Vallecas is approximately 13 miles respectively 21 kilometers.
By car or train, the actual journey to Villa de Vallecas is certainly longer, as only the direct route (as the crow flies) between San Sebastián de los Reyes and Villa de Vallecas has been calculated here.
Air line (approximately)
21 kilometers
11 nautical miles