The calculated distance (air line) between Castanheira do Ribatejo and Rio Tinto is approximately 153 miles respectively 246 kilometers.
By car or train, the actual journey to Rio Tinto is certainly longer, as only the direct route (as the crow flies) between Castanheira do Ribatejo and Rio Tinto has been calculated here.
Air line (approximately)
246 kilometers
133 nautical miles