| Otopeni to Opwijk | 1,103.69 mi (1,776.22 km) |
| Otopeni to Ostend | 1,161.28 mi (1,868.90 km) |
| Otopeni to Oud-Heverlee | 1,080.94 mi (1,739.61 km) |
| Otopeni to Oud-Turnhout | 1,077.18 mi (1,733.56 km) |
| Otopeni to Oudenaarde | 1,126.26 mi (1,812.54 km) |
| Otopeni to Oudenburg | 1,157.17 mi (1,862.29 km) |
| Otopeni to Oupeye | 1,037.54 mi (1,669.76 km) |
| Otopeni to Overijse | 1,085.66 mi (1,747.20 km) |
| Otopeni to Overpelt | 1,057.23 mi (1,701.46 km) |
| Otopeni to Paal | 1,063.70 mi (1,711.86 km) |
| Otopeni to Peer | 1,053.96 mi (1,696.18 km) |
| Otopeni to Pepinster | 1,027.51 mi (1,653.62 km) |
| Otopeni to Peruwelz | 1,121.63 mi (1,805.09 km) |
| Otopeni to Perwez | 1,070.92 mi (1,723.48 km) |
| Otopeni to Philippeville | 1,075.21 mi (1,730.38 km) |
