| Seymour to Opwijk | 4,201.80 mi (6,762.14 km) |
| Seymour to Ostend | 4,144.74 mi (6,670.32 km) |
| Seymour to Oud-Heverlee | 4,224.75 mi (6,799.07 km) |
| Seymour to Oud-Turnhout | 4,221.60 mi (6,794.01 km) |
| Seymour to Oudenaarde | 4,182.78 mi (6,731.53 km) |
| Seymour to Oudenburg | 4,149.17 mi (6,677.44 km) |
| Seymour to Oupeye | 4,266.53 mi (6,866.32 km) |
| Seymour to Overijse | 4,221.16 mi (6,793.30 km) |
| Seymour to Overpelt | 4,241.41 mi (6,825.89 km) |
| Seymour to Paal | 4,237.73 mi (6,819.96 km) |
| Seymour to Peer | 4,245.52 mi (6,832.50 km) |
| Seymour to Pepinster | 4,277.86 mi (6,884.54 km) |
| Seymour to Peruwelz | 4,192.51 mi (6,747.19 km) |
| Seymour to Perwez | 4,237.17 mi (6,819.07 km) |
| Seymour to Philippeville | 4,240.41 mi (6,824.28 km) |
