| Idrija to Cognac | 690.33 mi (1,110.98 km) |
| Idrija to Cogolin | 414.52 mi (667.10 km) |
| Idrija to Colmar | 345.28 mi (555.67 km) |
| Idrija to Colombes | 585.15 mi (941.71 km) |
| Idrija to Colomiers | 642.83 mi (1,034.54 km) |
| Idrija to Combs-la-Ville | 567.04 mi (912.56 km) |
| Idrija to Comines | 602.22 mi (969.18 km) |
| Idrija to Compiegne | 571.06 mi (919.03 km) |
| Idrija to Concarneau | 854.46 mi (1,375.12 km) |
| Idrija to Conde-sur-l'Escaut | 569.46 mi (916.45 km) |
| Idrija to Conflans-Sainte-Honorine | 593.29 mi (954.82 km) |
| Idrija to Corbas | 439.66 mi (707.57 km) |
| Idrija to Corbeil-Essonnes | 569.52 mi (916.56 km) |
| Idrija to Cormeilles-en-Parisis | 588.32 mi (946.81 km) |
| Idrija to Cosne sur Loire | 534.47 mi (860.14 km) |
