| Onesti to Opwijk | 1,076.85 mi (1,733.03 km) |
| Onesti to Ostend | 1,133.74 mi (1,824.58 km) |
| Onesti to Oud-Heverlee | 1,054.63 mi (1,697.26 km) |
| Onesti to Oud-Turnhout | 1,046.82 mi (1,684.69 km) |
| Onesti to Oudenaarde | 1,100.85 mi (1,771.65 km) |
| Onesti to Oudenburg | 1,129.87 mi (1,818.35 km) |
| Onesti to Oupeye | 1,011.13 mi (1,627.26 km) |
| Onesti to Overijse | 1,059.87 mi (1,705.69 km) |
| Onesti to Overpelt | 1,027.11 mi (1,652.97 km) |
| Onesti to Paal | 1,035.24 mi (1,666.06 km) |
| Onesti to Peer | 1,024.43 mi (1,648.67 km) |
| Onesti to Pepinster | 1,002.04 mi (1,612.63 km) |
| Onesti to Peruwelz | 1,098.72 mi (1,768.22 km) |
| Onesti to Perwez | 1,046.07 mi (1,683.49 km) |
| Onesti to Philippeville | 1,053.92 mi (1,696.12 km) |
