The calculated distance (air line) between Santa Iria da Azóia and Rio Tinto is approximately 164 miles respectively 264 kilometers.
By car or train, the actual journey to Rio Tinto is certainly longer, as only the direct route (as the crow flies) between Santa Iria da Azóia and Rio Tinto has been calculated here.
Air line (approximately)
264 kilometers
142 nautical miles