| Gennevilliers to Opwijk | 163.54 mi (263.19 km) |
| Gennevilliers to Ostend | 160.76 mi (258.71 km) |
| Gennevilliers to Oud-Heverlee | 168.31 mi (270.87 km) |
| Gennevilliers to Oud-Turnhout | 203.06 mi (326.80 km) |
| Gennevilliers to Oudenaarde | 144.52 mi (232.58 km) |
| Gennevilliers to Oudenburg | 158.53 mi (255.13 km) |
| Gennevilliers to Oupeye | 192.97 mi (310.55 km) |
| Gennevilliers to Overijse | 161.95 mi (260.64 km) |
| Gennevilliers to Overpelt | 209.70 mi (337.48 km) |
| Gennevilliers to Paal | 193.51 mi (311.43 km) |
| Gennevilliers to Peer | 206.56 mi (332.43 km) |
| Gennevilliers to Pepinster | 193.32 mi (311.11 km) |
| Gennevilliers to Peruwelz | 123.50 mi (198.76 km) |
| Gennevilliers to Perwez | 161.97 mi (260.66 km) |
| Gennevilliers to Philippeville | 133.50 mi (214.85 km) |
