| Harbiye to Opwijk | 1,878.34 mi (3,022.90 km) |
| Harbiye to Ostend | 1,936.00 mi (3,115.69 km) |
| Harbiye to Oud-Heverlee | 1,855.38 mi (2,985.94 km) |
| Harbiye to Oud-Turnhout | 1,854.93 mi (2,985.21 km) |
| Harbiye to Oudenaarde | 1,899.41 mi (3,056.80 km) |
| Harbiye to Oudenburg | 1,931.72 mi (3,108.81 km) |
| Harbiye to Oupeye | 1,812.52 mi (2,916.97 km) |
| Harbiye to Overijse | 1,859.59 mi (2,992.72 km) |
| Harbiye to Overpelt | 1,834.97 mi (2,953.10 km) |
| Harbiye to Paal | 1,840.09 mi (2,961.35 km) |
| Harbiye to Peer | 1,831.27 mi (2,947.14 km) |
| Harbiye to Pepinster | 1,801.80 mi (2,899.72 km) |
| Harbiye to Peruwelz | 1,892.43 mi (3,045.58 km) |
| Harbiye to Perwez | 1,844.16 mi (2,967.89 km) |
| Harbiye to Philippeville | 1,844.97 mi (2,969.19 km) |
