| Ridge to Opwijk | 3,595.15 mi (5,785.84 km) |
| Ridge to Ostend | 3,537.51 mi (5,693.08 km) |
| Ridge to Oud-Heverlee | 3,618.12 mi (5,822.81 km) |
| Ridge to Oud-Turnhout | 3,618.87 mi (5,824.00 km) |
| Ridge to Oudenaarde | 3,574.25 mi (5,752.19 km) |
| Ridge to Oudenburg | 3,541.79 mi (5,699.97 km) |
| Ridge to Oupeye | 3,660.97 mi (5,891.76 km) |
| Ridge to Overijse | 3,613.95 mi (5,816.09 km) |
| Ridge to Overpelt | 3,638.83 mi (5,856.14 km) |
| Ridge to Paal | 3,633.47 mi (5,847.51 km) |
| Ridge to Peer | 3,642.44 mi (5,861.95 km) |
| Ridge to Pepinster | 3,671.69 mi (5,909.02 km) |
| Ridge to Peruwelz | 3,581.71 mi (5,764.21 km) |
| Ridge to Perwez | 3,629.43 mi (5,841.01 km) |
| Ridge to Philippeville | 3,629.36 mi (5,840.89 km) |
