| Le Grand-Saconnex to Opwijk | 338.74 mi (545.14 km) |
| Le Grand-Saconnex to Ostend | 374.37 mi (602.49 km) |
| Le Grand-Saconnex to Oud-Heverlee | 324.66 mi (522.49 km) |
| Le Grand-Saconnex to Oud-Turnhout | 354.99 mi (571.30 km) |
| Le Grand-Saconnex to Oudenaarde | 339.07 mi (545.68 km) |
| Le Grand-Saconnex to Oudenburg | 370.27 mi (595.89 km) |
| Le Grand-Saconnex to Oupeye | 309.95 mi (498.82 km) |
| Le Grand-Saconnex to Overijse | 322.60 mi (519.18 km) |
| Le Grand-Saconnex to Overpelt | 345.79 mi (556.50 km) |
| Le Grand-Saconnex to Paal | 334.83 mi (538.86 km) |
| Le Grand-Saconnex to Peer | 339.87 mi (546.96 km) |
| Le Grand-Saconnex to Pepinster | 299.72 mi (482.36 km) |
| Le Grand-Saconnex to Peruwelz | 317.93 mi (511.65 km) |
| Le Grand-Saconnex to Perwez | 309.18 mi (497.57 km) |
| Le Grand-Saconnex to Philippeville | 283.39 mi (456.07 km) |
