| Port Huron to Oliveira de Frades | 3,694.68 mi (5,946.01 km) |
| Port Huron to Oliveira do Bairro | 3,686.79 mi (5,933.31 km) |
| Port Huron to Oliveira do Hospital | 3,721.40 mi (5,989.01 km) |
| Port Huron to Ourem | 3,712.82 mi (5,975.20 km) |
| Port Huron to Ovar | 3,669.05 mi (5,904.77 km) |
| Port Huron to Pacos de Ferreira | 3,666.57 mi (5,900.78 km) |
| Port Huron to Palmela | 3,734.30 mi (6,009.78 km) |
| Port Huron to Paredes | 3,671.81 mi (5,909.21 km) |
| Port Huron to Paredes de Coura | 3,638.14 mi (5,855.03 km) |
| Port Huron to Penacova | 3,704.99 mi (5,962.61 km) |
| Port Huron to Penafiel | 3,673.87 mi (5,912.52 km) |
| Port Huron to Peniche | 3,685.77 mi (5,931.68 km) |
| Port Huron to Peso da Regua | 3,698.40 mi (5,951.99 km) |
| Port Huron to Pinhal Novo | 3,731.43 mi (6,005.16 km) |
| Port Huron to Pinhel | 3,743.57 mi (6,024.69 km) |
