The calculated distance (air line) between Rivas-Vaciamadrid and Valdemoro is approximately 13 miles respectively 21 kilometers.
By car or train, the actual journey to Valdemoro is certainly longer, as only the direct route (as the crow flies) between Rivas-Vaciamadrid and Valdemoro has been calculated here.
Air line (approximately)
21 kilometers
11 nautical miles