| Port Royal to Opwijk | 4,312.16 mi (6,939.75 km) |
| Port Royal to Ostend | 4,254.47 mi (6,846.91 km) |
| Port Royal to Oud-Heverlee | 4,335.06 mi (6,976.60 km) |
| Port Royal to Oud-Turnhout | 4,337.37 mi (6,980.32 km) |
| Port Royal to Oudenaarde | 4,290.52 mi (6,904.93 km) |
| Port Royal to Oudenburg | 4,258.68 mi (6,853.68 km) |
| Port Royal to Oupeye | 4,378.20 mi (7,046.04 km) |
| Port Royal to Overijse | 4,330.65 mi (6,969.50 km) |
| Port Royal to Overpelt | 4,357.33 mi (7,012.45 km) |
| Port Royal to Paal | 4,351.32 mi (7,002.78 km) |
| Port Royal to Peer | 4,360.74 mi (7,017.93 km) |
| Port Royal to Pepinster | 4,388.64 mi (7,062.84 km) |
| Port Royal to Peruwelz | 4,296.97 mi (6,915.30 km) |
| Port Royal to Perwez | 4,345.86 mi (6,993.98 km) |
| Port Royal to Philippeville | 4,344.32 mi (6,991.51 km) |
