| Grottaglie to Opwijk | 960.27 mi (1,545.40 km) |
| Grottaglie to Ostend | 1,012.87 mi (1,630.05 km) |
| Grottaglie to Oud-Heverlee | 938.71 mi (1,510.70 km) |
| Grottaglie to Oud-Turnhout | 952.88 mi (1,533.51 km) |
| Grottaglie to Oudenaarde | 973.51 mi (1,566.72 km) |
| Grottaglie to Oudenburg | 1,008.31 mi (1,622.71 km) |
| Grottaglie to Oupeye | 902.63 mi (1,452.64 km) |
| Grottaglie to Overijse | 940.48 mi (1,513.56 km) |
| Grottaglie to Overpelt | 935.05 mi (1,504.82 km) |
| Grottaglie to Paal | 933.33 mi (1,502.05 km) |
| Grottaglie to Peer | 929.70 mi (1,496.21 km) |
| Grottaglie to Pepinster | 890.29 mi (1,432.79 km) |
| Grottaglie to Peruwelz | 958.90 mi (1,543.20 km) |
| Grottaglie to Perwez | 923.97 mi (1,486.99 km) |
| Grottaglie to Philippeville | 912.46 mi (1,468.46 km) |
