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