| Isernia to Novi di Modena | 282.65 mi (454.89 km) |
| Isernia to Novi Ligure | 350.68 mi (564.36 km) |
| Isernia to Nuoro | 270.94 mi (436.03 km) |
| Isernia to Occhiobello | 265.43 mi (427.17 km) |
| Isernia to Oderzo | 301.55 mi (485.31 km) |
| Isernia to Oggiono | 378.14 mi (608.55 km) |
| Isernia to Olbia | 250.66 mi (403.41 km) |
| Isernia to Oleggio | 393.46 mi (633.22 km) |
| Isernia to Olgiate Comasco | 390.75 mi (628.85 km) |
| Isernia to Olgiate Olona | 386.27 mi (621.64 km) |
| Isernia to Omegna | 414.55 mi (667.15 km) |
| Isernia to Opera | 362.65 mi (583.63 km) |
| Isernia to Oppeano | 297.87 mi (479.37 km) |
| Isernia to Orbassano | 410.77 mi (661.07 km) |
| Isernia to Orbetello | 165.78 mi (266.79 km) |
