| Middle Island to Opwijk | 3,598.66 mi (5,791.49 km) |
| Middle Island to Ostend | 3,541.02 mi (5,698.72 km) |
| Middle Island to Oud-Heverlee | 3,621.63 mi (5,828.46 km) |
| Middle Island to Oud-Turnhout | 3,622.37 mi (5,829.63 km) |
| Middle Island to Oudenaarde | 3,577.76 mi (5,757.85 km) |
| Middle Island to Oudenburg | 3,545.30 mi (5,705.62 km) |
| Middle Island to Oupeye | 3,664.48 mi (5,897.41 km) |
| Middle Island to Overijse | 3,617.46 mi (5,821.74 km) |
| Middle Island to Overpelt | 3,642.33 mi (5,861.77 km) |
| Middle Island to Paal | 3,636.97 mi (5,853.14 km) |
| Middle Island to Peer | 3,645.94 mi (5,867.58 km) |
| Middle Island to Pepinster | 3,675.20 mi (5,914.67 km) |
| Middle Island to Peruwelz | 3,585.23 mi (5,769.88 km) |
| Middle Island to Perwez | 3,632.95 mi (5,846.66 km) |
| Middle Island to Philippeville | 3,632.88 mi (5,846.56 km) |
