| Oliveira de Frades to Opwijk | 922.61 mi (1,484.80 km) |
| Oliveira de Frades to Ostend | 898.71 mi (1,446.33 km) |
| Oliveira de Frades to Oud-Heverlee | 931.17 mi (1,498.57 km) |
| Oliveira de Frades to Oud-Turnhout | 964.25 mi (1,551.82 km) |
| Oliveira de Frades to Oudenaarde | 899.15 mi (1,447.04 km) |
| Oliveira de Frades to Oudenburg | 898.75 mi (1,446.40 km) |
| Oliveira de Frades to Oupeye | 956.95 mi (1,540.06 km) |
| Oliveira de Frades to Overijse | 924.57 mi (1,487.96 km) |
| Oliveira de Frades to Overpelt | 973.06 mi (1,565.99 km) |
| Oliveira de Frades to Paal | 956.96 mi (1,540.08 km) |
| Oliveira de Frades to Peer | 970.30 mi (1,561.54 km) |
| Oliveira de Frades to Pepinster | 956.40 mi (1,539.18 km) |
| Oliveira de Frades to Peruwelz | 882.05 mi (1,419.52 km) |
| Oliveira de Frades to Perwez | 926.01 mi (1,490.27 km) |
| Oliveira de Frades to Philippeville | 897.66 mi (1,444.64 km) |
