| Cities | Distance |
|---|---|
| Isernia to Oegstgeest | 862.78 mi (1,388.51 km) |
| Isernia to Oirschot | 803.69 mi (1,293.41 km) |
| Isernia to Oisterwijk | 810.87 mi (1,304.97 km) |
| Isernia to Oldebroek | 844.85 mi (1,359.66 km) |
| Isernia to Oldenzaal | 815.52 mi (1,312.45 km) |
| Isernia to Ommen | 838.02 mi (1,348.66 km) |
| Isernia to Oosterend | 874.54 mi (1,407.44 km) |
| Isernia to Oosterhout | 822.82 mi (1,324.20 km) |
| Isernia to Oosterwolde | 869.24 mi (1,398.91 km) |
| Isernia to Oostzaan | 866.84 mi (1,395.05 km) |
| Isernia to Opmeer | 880.64 mi (1,417.25 km) |
| Isernia to Oss | 813.62 mi (1,309.39 km) |
| Isernia to Oud-Beijerland | 844.12 mi (1,358.48 km) |
| Isernia to Oudenbosch | 828.40 mi (1,333.18 km) |
| Isernia to Oudewater | 843.54 mi (1,357.55 km) |