| Gunbarrel to Opwijk | 4,844.10 mi (7,795.82 km) |
| Gunbarrel to Ostend | 4,790.36 mi (7,709.33 km) |
| Gunbarrel to Oud-Heverlee | 4,866.16 mi (7,831.32 km) |
| Gunbarrel to Oud-Turnhout | 4,855.09 mi (7,813.51 km) |
| Gunbarrel to Oudenaarde | 4,829.68 mi (7,772.62 km) |
| Gunbarrel to Oudenburg | 4,794.91 mi (7,716.67 km) |
| Gunbarrel to Oupeye | 4,904.21 mi (7,892.56 km) |
| Gunbarrel to Overijse | 4,863.93 mi (7,827.74 km) |
| Gunbarrel to Overpelt | 4,873.84 mi (7,843.68 km) |
| Gunbarrel to Paal | 4,873.76 mi (7,843.56 km) |
| Gunbarrel to Peer | 4,878.82 mi (7,851.70 km) |
| Gunbarrel to Pepinster | 4,916.36 mi (7,912.12 km) |
| Gunbarrel to Peruwelz | 4,843.78 mi (7,795.31 km) |
| Gunbarrel to Perwez | 4,880.45 mi (7,854.32 km) |
| Gunbarrel to Philippeville | 4,890.50 mi (7,870.50 km) |
