| Monte San Giovanni Campano to Opwijk | 782.46 mi (1,259.25 km) |
| Monte San Giovanni Campano to Ostend | 831.27 mi (1,337.80 km) |
| Monte San Giovanni Campano to Oud-Heverlee | 762.32 mi (1,226.84 km) |
| Monte San Giovanni Campano to Oud-Turnhout | 781.44 mi (1,257.60 km) |
| Monte San Giovanni Campano to Oudenaarde | 792.29 mi (1,275.07 km) |
| Monte San Giovanni Campano to Oudenburg | 826.76 mi (1,330.55 km) |
| Monte San Giovanni Campano to Oupeye | 730.55 mi (1,175.71 km) |
| Monte San Giovanni Campano to Overijse | 763.10 mi (1,228.09 km) |
| Monte San Giovanni Campano to Overpelt | 765.27 mi (1,231.58 km) |
| Monte San Giovanni Campano to Paal | 760.99 mi (1,224.69 km) |
| Monte San Giovanni Campano to Peer | 759.54 mi (1,222.37 km) |
| Monte San Giovanni Campano to Pepinster | 718.19 mi (1,155.81 km) |
| Monte San Giovanni Campano to Peruwelz | 775.37 mi (1,247.84 km) |
| Monte San Giovanni Campano to Perwez | 746.88 mi (1,201.98 km) |
| Monte San Giovanni Campano to Philippeville | 731.08 mi (1,176.55 km) |
