| Orbetello to Opwijk | 676.09 mi (1,088.05 km) |
| Orbetello to Ostend | 721.63 mi (1,161.34 km) |
| Orbetello to Oud-Heverlee | 657.25 mi (1,057.75 km) |
| Orbetello to Oud-Turnhout | 679.67 mi (1,093.83 km) |
| Orbetello to Oudenaarde | 683.34 mi (1,099.73 km) |
| Orbetello to Oudenburg | 717.20 mi (1,154.22 km) |
| Orbetello to Oupeye | 629.15 mi (1,012.52 km) |
| Orbetello to Overijse | 657.29 mi (1,057.80 km) |
| Orbetello to Overpelt | 664.96 mi (1,070.15 km) |
| Orbetello to Paal | 658.89 mi (1,060.38 km) |
| Orbetello to Peer | 659.06 mi (1,060.65 km) |
| Orbetello to Pepinster | 616.99 mi (992.95 km) |
| Orbetello to Peruwelz | 664.97 mi (1,070.16 km) |
| Orbetello to Perwez | 641.51 mi (1,032.41 km) |
| Orbetello to Philippeville | 622.79 mi (1,002.28 km) |
