| Cities | Distance |
|---|---|
| Isernia to Oria | 192.52 mi (309.84 km) |
| Isernia to Oristano | 317.94 mi (511.68 km) |
| Isernia to Orta Nova | 78.48 mi (126.30 km) |
| Isernia to Orte | 112.07 mi (180.35 km) |
| Isernia to Ortona | 52.28 mi (84.13 km) |
| Isernia to Orvieto | 133.54 mi (214.91 km) |
| Isernia to Orzinuovi | 339.62 mi (546.56 km) |
| Isernia to Osimo | 135.51 mi (218.09 km) |
| Isernia to Ospitaletto | 343.50 mi (552.82 km) |
| Isernia to Ostuni | 183.98 mi (296.08 km) |
| Isernia to Ottaviano | 53.46 mi (86.04 km) |
| Isernia to Ovada | 351.41 mi (565.53 km) |
| Isernia to Ozieri | 281.54 mi (453.09 km) |
| Isernia to Paceco | 265.67 mi (427.55 km) |
| Isernia to Pachino | 340.72 mi (548.34 km) |