| Ariano Irpino to Opwijk | 854.35 mi (1,374.94 km) |
| Ariano Irpino to Ostend | 904.89 mi (1,456.28 km) |
| Ariano Irpino to Oud-Heverlee | 833.54 mi (1,341.45 km) |
| Ariano Irpino to Oud-Turnhout | 850.58 mi (1,368.88 km) |
| Ariano Irpino to Oudenaarde | 865.66 mi (1,393.15 km) |
| Ariano Irpino to Oudenburg | 900.35 mi (1,448.97 km) |
| Ariano Irpino to Oupeye | 799.81 mi (1,287.17 km) |
| Ariano Irpino to Overijse | 834.75 mi (1,343.40 km) |
| Ariano Irpino to Overpelt | 833.65 mi (1,341.62 km) |
| Ariano Irpino to Paal | 830.46 mi (1,336.49 km) |
| Ariano Irpino to Peer | 828.07 mi (1,332.64 km) |
| Ariano Irpino to Pepinster | 787.42 mi (1,267.22 km) |
| Ariano Irpino to Peruwelz | 849.69 mi (1,367.44 km) |
| Ariano Irpino to Perwez | 818.36 mi (1,317.02 km) |
| Ariano Irpino to Philippeville | 804.36 mi (1,294.50 km) |
