| Plan-les-Ouates to Opwijk | 343.19 mi (552.32 km) |
| Plan-les-Ouates to Ostend | 378.65 mi (609.38 km) |
| Plan-les-Ouates to Oud-Heverlee | 329.18 mi (529.76 km) |
| Plan-les-Ouates to Oud-Turnhout | 359.55 mi (578.63 km) |
| Plan-les-Ouates to Oudenaarde | 343.43 mi (552.69 km) |
| Plan-les-Ouates to Oudenburg | 374.56 mi (602.80 km) |
| Plan-les-Ouates to Oupeye | 314.54 mi (506.21 km) |
| Plan-les-Ouates to Overijse | 327.10 mi (526.41 km) |
| Plan-les-Ouates to Overpelt | 350.37 mi (563.87 km) |
| Plan-les-Ouates to Paal | 339.40 mi (546.21 km) |
| Plan-les-Ouates to Peer | 344.45 mi (554.34 km) |
| Plan-les-Ouates to Pepinster | 304.32 mi (489.76 km) |
| Plan-les-Ouates to Peruwelz | 322.24 mi (518.59 km) |
| Plan-les-Ouates to Perwez | 313.70 mi (504.85 km) |
| Plan-les-Ouates to Philippeville | 287.85 mi (463.25 km) |
