| Glen Allen to Opwijk | 3,927.61 mi (6,320.88 km) |
| Glen Allen to Ostend | 3,869.96 mi (6,228.11 km) |
| Glen Allen to Oud-Heverlee | 3,950.58 mi (6,357.84 km) |
| Glen Allen to Oud-Turnhout | 3,951.43 mi (6,359.21 km) |
| Glen Allen to Oudenaarde | 3,906.64 mi (6,287.14 km) |
| Glen Allen to Oudenburg | 3,874.24 mi (6,234.99 km) |
| Glen Allen to Oupeye | 3,993.45 mi (6,426.84 km) |
| Glen Allen to Overijse | 3,946.38 mi (6,351.09 km) |
| Glen Allen to Overpelt | 3,971.39 mi (6,391.34 km) |
| Glen Allen to Paal | 3,965.99 mi (6,382.65 km) |
| Glen Allen to Peer | 3,974.99 mi (6,397.13 km) |
| Glen Allen to Pepinster | 4,004.16 mi (6,444.06 km) |
| Glen Allen to Peruwelz | 3,914.02 mi (6,299.01 km) |
| Glen Allen to Perwez | 3,961.85 mi (6,375.98 km) |
| Glen Allen to Philippeville | 3,961.64 mi (6,375.65 km) |
