| Somma Lombardo to Opwijk | 419.71 mi (675.46 km) |
| Somma Lombardo to Ostend | 465.32 mi (748.85 km) |
| Somma Lombardo to Oud-Heverlee | 401.15 mi (645.59 km) |
| Somma Lombardo to Oud-Turnhout | 424.66 mi (683.42 km) |
| Somma Lombardo to Oudenaarde | 426.92 mi (687.06 km) |
| Somma Lombardo to Oudenburg | 460.87 mi (741.71 km) |
| Somma Lombardo to Oupeye | 374.57 mi (602.81 km) |
| Somma Lombardo to Overijse | 401.02 mi (645.38 km) |
| Somma Lombardo to Overpelt | 410.76 mi (661.05 km) |
| Somma Lombardo to Paal | 403.81 mi (649.88 km) |
| Somma Lombardo to Peer | 404.79 mi (651.45 km) |
| Somma Lombardo to Pepinster | 362.60 mi (583.54 km) |
| Somma Lombardo to Peruwelz | 408.77 mi (657.85 km) |
| Somma Lombardo to Perwez | 385.36 mi (620.18 km) |
| Somma Lombardo to Philippeville | 366.32 mi (589.53 km) |
