| San Gennaro Vesuviano to Opwijk | 855.25 mi (1,376.39 km) |
| San Gennaro Vesuviano to Ostend | 904.63 mi (1,455.87 km) |
| San Gennaro Vesuviano to Oud-Heverlee | 834.87 mi (1,343.60 km) |
| San Gennaro Vesuviano to Oud-Turnhout | 853.23 mi (1,373.14 km) |
| San Gennaro Vesuviano to Oudenaarde | 865.57 mi (1,393.00 km) |
| San Gennaro Vesuviano to Oudenburg | 900.11 mi (1,448.59 km) |
| San Gennaro Vesuviano to Oupeye | 802.36 mi (1,291.27 km) |
| San Gennaro Vesuviano to Overijse | 835.80 mi (1,345.08 km) |
| San Gennaro Vesuviano to Overpelt | 836.75 mi (1,346.62 km) |
| San Gennaro Vesuviano to Paal | 832.90 mi (1,340.42 km) |
| San Gennaro Vesuviano to Peer | 831.08 mi (1,337.50 km) |
| San Gennaro Vesuviano to Pepinster | 789.98 mi (1,271.35 km) |
| San Gennaro Vesuviano to Peruwelz | 848.92 mi (1,366.21 km) |
| San Gennaro Vesuviano to Perwez | 819.51 mi (1,318.87 km) |
| San Gennaro Vesuviano to Philippeville | 804.30 mi (1,294.39 km) |
