| Portimao to Opwijk | 1,141.91 mi (1,837.72 km) |
| Portimao to Ostend | 1,123.89 mi (1,808.73 km) |
| Portimao to Oud-Heverlee | 1,147.94 mi (1,847.43 km) |
| Portimao to Oud-Turnhout | 1,182.47 mi (1,902.99 km) |
| Portimao to Oudenaarde | 1,120.04 mi (1,802.53 km) |
| Portimao to Oudenburg | 1,123.46 mi (1,808.03 km) |
| Portimao to Oupeye | 1,169.31 mi (1,881.83 km) |
| Portimao to Overijse | 1,141.57 mi (1,837.18 km) |
| Portimao to Overpelt | 1,189.19 mi (1,913.81 km) |
| Portimao to Paal | 1,172.99 mi (1,887.75 km) |
| Portimao to Peer | 1,185.83 mi (1,908.41 km) |
| Portimao to Pepinster | 1,167.24 mi (1,878.49 km) |
| Portimao to Peruwelz | 1,101.26 mi (1,772.31 km) |
| Portimao to Perwez | 1,141.03 mi (1,836.30 km) |
| Portimao to Philippeville | 1,111.17 mi (1,788.25 km) |
