| Halfway to Opwijk | 3,849.99 mi (6,195.96 km) |
| Halfway to Ostend | 3,792.45 mi (6,103.35 km) |
| Halfway to Oud-Heverlee | 3,872.98 mi (6,232.96 km) |
| Halfway to Oud-Turnhout | 3,872.62 mi (6,232.38 km) |
| Halfway to Oudenaarde | 3,829.59 mi (6,163.13 km) |
| Halfway to Oudenburg | 3,796.78 mi (6,110.32 km) |
| Halfway to Oupeye | 3,915.58 mi (6,301.51 km) |
| Halfway to Overijse | 3,868.97 mi (6,226.50 km) |
| Halfway to Overpelt | 3,892.56 mi (6,264.48 km) |
| Halfway to Paal | 3,887.67 mi (6,256.61 km) |
| Halfway to Peer | 3,896.32 mi (6,270.52 km) |
| Halfway to Pepinster | 3,926.48 mi (6,319.06 km) |
| Halfway to Peruwelz | 3,837.71 mi (6,176.19 km) |
| Halfway to Perwez | 3,884.62 mi (6,251.69 km) |
| Halfway to Philippeville | 3,885.48 mi (6,253.07 km) |
