| Opera to Oliveira do Bairro | 954.53 mi (1,536.17 km) |
| Opera to Oliveira do Hospital | 929.62 mi (1,496.07 km) |
| Opera to Ourem | 985.76 mi (1,586.42 km) |
| Opera to Ovar | 950.30 mi (1,529.35 km) |
| Opera to Pacos de Ferreira | 927.80 mi (1,493.15 km) |
| Opera to Palmela | 1,039.75 mi (1,673.32 km) |
| Opera to Paredes | 926.50 mi (1,491.06 km) |
| Opera to Paredes de Coura | 918.50 mi (1,478.19 km) |
| Opera to Penacova | 952.09 mi (1,532.25 km) |
| Opera to Penafiel | 923.99 mi (1,487.02 km) |
| Opera to Peniche | 1,033.08 mi (1,662.57 km) |
| Opera to Peso da Regua | 901.09 mi (1,450.16 km) |
| Opera to Pinhal Novo | 1,037.99 mi (1,670.49 km) |
| Opera to Pinhel | 879.08 mi (1,414.74 km) |
| Opera to Pombal | 979.69 mi (1,576.66 km) |
