| San Giorgio del Sannio to Opwijk | 852.46 mi (1,371.90 km) |
| San Giorgio del Sannio to Ostend | 902.56 mi (1,452.53 km) |
| San Giorgio del Sannio to Oud-Heverlee | 831.81 mi (1,338.68 km) |
| San Giorgio del Sannio to Oud-Turnhout | 849.38 mi (1,366.94 km) |
| San Giorgio del Sannio to Oudenaarde | 863.39 mi (1,389.49 km) |
| San Giorgio del Sannio to Oudenburg | 898.03 mi (1,445.23 km) |
| San Giorgio del Sannio to Oupeye | 798.55 mi (1,285.15 km) |
| San Giorgio del Sannio to Overijse | 832.91 mi (1,340.44 km) |
| San Giorgio del Sannio to Overpelt | 832.62 mi (1,339.97 km) |
| San Giorgio del Sannio to Paal | 829.17 mi (1,334.41 km) |
| San Giorgio del Sannio to Peer | 827.00 mi (1,330.93 km) |
| San Giorgio del Sannio to Pepinster | 786.16 mi (1,265.21 km) |
| San Giorgio del Sannio to Peruwelz | 847.15 mi (1,363.36 km) |
| San Giorgio del Sannio to Perwez | 816.56 mi (1,314.12 km) |
| San Giorgio del Sannio to Philippeville | 802.09 mi (1,290.83 km) |
