| Isernia to Cividale del Friuli | 313.31 mi (504.22 km) |
| Isernia to Civita Castellana | 105.52 mi (169.82 km) |
| Isernia to Civitanova Marche | 120.07 mi (193.24 km) |
| Isernia to Civitavecchia | 130.17 mi (209.49 km) |
| Isernia to Civitella in Val di Chiana | 179.48 mi (288.85 km) |
| Isernia to Clusone | 365.01 mi (587.42 km) |
| Isernia to Coccaglio | 346.83 mi (558.17 km) |
| Isernia to Codigoro | 247.46 mi (398.25 km) |
| Isernia to Codogno | 334.95 mi (539.04 km) |
| Isernia to Codroipo | 307.71 mi (495.21 km) |
| Isernia to Cogoleto | 341.89 mi (550.21 km) |
| Isernia to Colle di Val d'Elsa | 201.12 mi (323.67 km) |
| Isernia to Colle Salvetti | 235.63 mi (379.21 km) |
| Isernia to Collecchio | 297.20 mi (478.30 km) |
| Isernia to Colleferro | 63.76 mi (102.62 km) |
