| Ariano Irpino to Novi di Modena | 333.89 mi (537.34 km) |
| Ariano Irpino to Novi Ligure | 404.37 mi (650.78 km) |
| Ariano Irpino to Nuoro | 306.76 mi (493.68 km) |
| Ariano Irpino to Occhiobello | 314.87 mi (506.73 km) |
| Ariano Irpino to Oderzo | 345.20 mi (555.54 km) |
| Ariano Irpino to Oggiono | 430.09 mi (692.16 km) |
| Ariano Irpino to Olbia | 291.69 mi (469.43 km) |
| Ariano Irpino to Oleggio | 446.41 mi (718.42 km) |
| Ariano Irpino to Olgiate Comasco | 443.14 mi (713.17 km) |
| Ariano Irpino to Olgiate Olona | 438.95 mi (706.43 km) |
| Ariano Irpino to Omegna | 467.33 mi (752.09 km) |
| Ariano Irpino to Opera | 415.38 mi (668.49 km) |
| Ariano Irpino to Oppeano | 347.42 mi (559.12 km) |
| Ariano Irpino to Orbassano | 464.63 mi (747.75 km) |
| Ariano Irpino to Orbetello | 218.54 mi (351.71 km) |
