| Sermoneta to Opwijk | 773.41 mi (1,244.68 km) |
| Sermoneta to Ostend | 821.17 mi (1,321.54 km) |
| Sermoneta to Oud-Heverlee | 753.67 mi (1,212.92 km) |
| Sermoneta to Oud-Turnhout | 773.86 mi (1,245.40 km) |
| Sermoneta to Oudenaarde | 782.39 mi (1,259.13 km) |
| Sermoneta to Oudenburg | 816.68 mi (1,314.33 km) |
| Sermoneta to Oupeye | 723.01 mi (1,163.57 km) |
| Sermoneta to Overijse | 754.20 mi (1,213.78 km) |
| Sermoneta to Overpelt | 758.11 mi (1,220.06 km) |
| Sermoneta to Paal | 753.27 mi (1,212.28 km) |
| Sermoneta to Peer | 752.32 mi (1,210.75 km) |
| Sermoneta to Pepinster | 710.69 mi (1,143.74 km) |
| Sermoneta to Peruwelz | 764.95 mi (1,231.06 km) |
| Sermoneta to Perwez | 738.11 mi (1,187.87 km) |
| Sermoneta to Philippeville | 721.32 mi (1,160.86 km) |
