| Cities | Distance |
|---|---|
| Isernia to Navodari | 749.55 mi (1,206.28 km) |
| Isernia to Negresti-Oas | 624.23 mi (1,004.60 km) |
| Isernia to Nehoiu | 657.22 mi (1,057.70 km) |
| Isernia to Ocna Mures | 580.77 mi (934.65 km) |
| Isernia to Odobesti | 701.45 mi (1,128.87 km) |
| Isernia to Odorheiu Secuiesc | 638.40 mi (1,027.41 km) |
| Isernia to Oltenita | 650.33 mi (1,046.61 km) |
| Isernia to Onesti | 700.45 mi (1,127.27 km) |
| Isernia to Oradea | 535.14 mi (861.22 km) |
| Isernia to Orastie | 534.54 mi (860.26 km) |
| Isernia to Oravita | 442.99 mi (712.92 km) |
| Isernia to Orsova | 463.92 mi (746.61 km) |
| Isernia to Otelu Rosu | 487.68 mi (784.85 km) |
| Isernia to Otopeni | 630.14 mi (1,014.11 km) |
| Isernia to Ovidiu | 746.37 mi (1,201.17 km) |