| Idrija to Cividale del Friuli | 29.28 mi (47.12 km) |
| Idrija to Civita Castellana | 268.33 mi (431.84 km) |
| Idrija to Civitanova Marche | 187.28 mi (301.40 km) |
| Idrija to Civitavecchia | 291.41 mi (468.98 km) |
| Idrija to Civitella in Val di Chiana | 211.63 mi (340.58 km) |
| Idrija to Clusone | 196.06 mi (315.53 km) |
| Idrija to Coccaglio | 197.43 mi (317.73 km) |
| Idrija to Codigoro | 122.93 mi (197.84 km) |
| Idrija to Codogno | 216.95 mi (349.15 km) |
| Idrija to Codroipo | 50.41 mi (81.12 km) |
| Idrija to Cogoleto | 284.66 mi (458.11 km) |
| Idrija to Colle di Val d'Elsa | 229.17 mi (368.82 km) |
| Idrija to Colle Salvetti | 240.26 mi (386.66 km) |
| Idrija to Collecchio | 204.17 mi (328.58 km) |
| Idrija to Colleferro | 299.23 mi (481.57 km) |
