| Oudenburg to Oliveira do Bairro | 919.36 mi (1,479.57 km) |
| Oudenburg to Oliveira do Hospital | 910.82 mi (1,465.82 km) |
| Oudenburg to Ourem | 972.01 mi (1,564.31 km) |
| Oudenburg to Ovar | 903.03 mi (1,453.28 km) |
| Oudenburg to Pacos de Ferreira | 873.34 mi (1,405.51 km) |
| Oudenburg to Palmela | 1,045.62 mi (1,682.76 km) |
| Oudenburg to Paredes | 875.19 mi (1,408.49 km) |
| Oudenburg to Paredes de Coura | 841.87 mi (1,354.86 km) |
| Oudenburg to Penacova | 927.61 mi (1,492.85 km) |
| Oudenburg to Penafiel | 873.41 mi (1,405.62 km) |
| Oudenburg to Peniche | 1,012.02 mi (1,628.69 km) |
| Oudenburg to Peso da Regua | 861.19 mi (1,385.95 km) |
| Oudenburg to Pinhal Novo | 1,042.13 mi (1,677.15 km) |
| Oudenburg to Pinhel | 864.24 mi (1,390.86 km) |
| Oudenburg to Pombal | 958.04 mi (1,541.81 km) |
