The calculated distance (air line) between Peso da Régua and Santo António dos Olivais is approximately 73 miles respectively 117 kilometers.
By car or train, the actual journey to Santo António dos Olivais is certainly longer, as only the direct route (as the crow flies) between Peso da Régua and Santo António dos Olivais has been calculated here.
Air line (approximately)
117 kilometers
63 nautical miles