| Severn to Opwijk | 3,828.43 mi (6,161.27 km) |
| Severn to Ostend | 3,770.82 mi (6,068.55 km) |
| Severn to Oud-Heverlee | 3,851.41 mi (6,198.25 km) |
| Severn to Oud-Turnhout | 3,851.74 mi (6,198.78 km) |
| Severn to Oudenaarde | 3,807.71 mi (6,127.91 km) |
| Severn to Oudenburg | 3,775.12 mi (6,075.47 km) |
| Severn to Oupeye | 3,894.17 mi (6,267.07 km) |
| Severn to Overijse | 3,847.30 mi (6,191.62 km) |
| Severn to Overpelt | 3,871.70 mi (6,230.90 km) |
| Severn to Paal | 3,866.52 mi (6,222.56 km) |
| Severn to Peer | 3,875.37 mi (6,236.80 km) |
| Severn to Pepinster | 3,904.96 mi (6,284.43 km) |
| Severn to Peruwelz | 3,815.41 mi (6,140.30 km) |
| Severn to Perwez | 3,862.84 mi (6,216.65 km) |
| Severn to Philippeville | 3,863.10 mi (6,217.06 km) |
