| River Grove to Oliveira de Frades | 3,973.72 mi (6,395.08 km) |
| River Grove to Oliveira do Bairro | 3,966.17 mi (6,382.93 km) |
| River Grove to Oliveira do Hospital | 4,000.66 mi (6,438.44 km) |
| River Grove to Ourem | 3,993.07 mi (6,426.22 km) |
| River Grove to Ovar | 3,948.13 mi (6,353.91 km) |
| River Grove to Pacos de Ferreira | 3,945.12 mi (6,349.05 km) |
| River Grove to Palmela | 4,015.61 mi (6,462.51 km) |
| River Grove to Paredes | 3,950.40 mi (6,357.56 km) |
| River Grove to Paredes de Coura | 3,916.03 mi (6,302.25 km) |
| River Grove to Penacova | 3,984.53 mi (6,412.48 km) |
| River Grove to Penafiel | 3,952.43 mi (6,360.82 km) |
| River Grove to Peniche | 3,966.61 mi (6,383.63 km) |
| River Grove to Peso da Regua | 3,976.77 mi (6,399.99 km) |
| River Grove to Pinhal Novo | 4,012.70 mi (6,457.81 km) |
| River Grove to Pinhel | 4,022.02 mi (6,472.82 km) |
