| Upper Grand Lagoon to Opwijk | 4,627.69 mi (7,447.54 km) |
| Upper Grand Lagoon to Ostend | 4,570.02 mi (7,354.73 km) |
| Upper Grand Lagoon to Oud-Heverlee | 4,650.64 mi (7,484.48 km) |
| Upper Grand Lagoon to Oud-Turnhout | 4,651.85 mi (7,486.42 km) |
| Upper Grand Lagoon to Oudenaarde | 4,606.53 mi (7,413.49 km) |
| Upper Grand Lagoon to Oudenburg | 4,574.28 mi (7,361.59 km) |
| Upper Grand Lagoon to Oupeye | 4,693.59 mi (7,553.61 km) |
| Upper Grand Lagoon to Overijse | 4,646.38 mi (7,477.63 km) |
| Upper Grand Lagoon to Overpelt | 4,671.82 mi (7,518.56 km) |
| Upper Grand Lagoon to Paal | 4,666.27 mi (7,509.64 km) |
| Upper Grand Lagoon to Peer | 4,675.37 mi (7,524.28 km) |
| Upper Grand Lagoon to Pepinster | 4,704.23 mi (7,570.72 km) |
| Upper Grand Lagoon to Peruwelz | 4,613.63 mi (7,424.92 km) |
| Upper Grand Lagoon to Perwez | 4,661.78 mi (7,502.41 km) |
| Upper Grand Lagoon to Philippeville | 4,661.18 mi (7,501.44 km) |
