| Omerli to Opwijk | 2,020.47 mi (3,251.63 km) |
| Omerli to Ostend | 2,077.91 mi (3,344.08 km) |
| Omerli to Oud-Heverlee | 1,997.84 mi (3,215.22 km) |
| Omerli to Oud-Turnhout | 1,992.64 mi (3,206.84 km) |
| Omerli to Oudenaarde | 2,043.46 mi (3,288.63 km) |
| Omerli to Oudenburg | 2,073.87 mi (3,337.58 km) |
| Omerli to Oupeye | 1,954.35 mi (3,145.23 km) |
| Omerli to Overijse | 2,002.71 mi (3,223.05 km) |
| Omerli to Overpelt | 1,972.76 mi (3,174.85 km) |
| Omerli to Paal | 1,979.88 mi (3,186.31 km) |
| Omerli to Peer | 1,969.72 mi (3,169.96 km) |
| Omerli to Pepinster | 1,944.57 mi (3,129.48 km) |
| Omerli to Peruwelz | 2,039.33 mi (3,281.99 km) |
| Omerli to Perwez | 1,988.19 mi (3,199.68 km) |
| Omerli to Philippeville | 1,993.09 mi (3,207.57 km) |
