| South Riding to Opwijk | 3,871.65 mi (6,230.82 km) |
| South Riding to Ostend | 3,814.06 mi (6,138.13 km) |
| South Riding to Oud-Heverlee | 3,894.63 mi (6,267.81 km) |
| South Riding to Oud-Turnhout | 3,894.77 mi (6,268.03 km) |
| South Riding to Oudenaarde | 3,851.01 mi (6,197.61 km) |
| South Riding to Oudenburg | 3,818.36 mi (6,145.06 km) |
| South Riding to Oupeye | 3,937.35 mi (6,336.55 km) |
| South Riding to Overijse | 3,890.55 mi (6,261.23 km) |
| South Riding to Overpelt | 3,914.73 mi (6,300.15 km) |
| South Riding to Paal | 3,909.63 mi (6,291.94 km) |
| South Riding to Peer | 3,918.42 mi (6,306.09 km) |
| South Riding to Pepinster | 3,948.17 mi (6,353.97 km) |
| South Riding to Peruwelz | 3,858.82 mi (6,210.18 km) |
| South Riding to Perwez | 3,906.12 mi (6,286.30 km) |
| South Riding to Philippeville | 3,906.54 mi (6,286.97 km) |
