| Guyancourt to Opwijk | 178.40 mi (287.10 km) |
| Guyancourt to Ostend | 173.69 mi (279.52 km) |
| Guyancourt to Oud-Heverlee | 183.46 mi (295.24 km) |
| Guyancourt to Oud-Turnhout | 218.12 mi (351.03 km) |
| Guyancourt to Oudenaarde | 158.91 mi (255.74 km) |
| Guyancourt to Oudenburg | 171.65 mi (276.24 km) |
| Guyancourt to Oupeye | 208.07 mi (334.85 km) |
| Guyancourt to Overijse | 177.08 mi (284.98 km) |
| Guyancourt to Overpelt | 224.88 mi (361.91 km) |
| Guyancourt to Paal | 208.69 mi (335.86 km) |
| Guyancourt to Peer | 221.75 mi (356.88 km) |
| Guyancourt to Pepinster | 208.28 mi (335.20 km) |
| Guyancourt to Peruwelz | 138.20 mi (222.42 km) |
| Guyancourt to Perwez | 177.16 mi (285.11 km) |
| Guyancourt to Philippeville | 148.63 mi (239.20 km) |
