The calculated distance (air line) between Arenas de San Pedro and Puente de Vallecas is approximately 76 miles respectively 123 kilometers.
By car or train, the actual journey to Puente de Vallecas is certainly longer, as only the direct route (as the crow flies) between Arenas de San Pedro and Puente de Vallecas has been calculated here.
Air line (approximately)
123 kilometers
66 nautical miles