| Idrija to Coudekerque-Branche | 634.54 mi (1,021.20 km) |
| Idrija to Coueron | 750.98 mi (1,208.58 km) |
| Idrija to Coulommiers | 546.79 mi (879.97 km) |
| Idrija to Courbevoic | 584.63 mi (940.88 km) |
| Idrija to Courcouronnes | 572.02 mi (920.58 km) |
| Idrija to Cournon-d'Auvergne | 520.92 mi (838.34 km) |
| Idrija to Courrieres | 594.79 mi (957.22 km) |
| Idrija to Coutras | 687.60 mi (1,106.58 km) |
| Idrija to Couzeix | 613.89 mi (987.97 km) |
| Idrija to Cran-Gevrier | 380.53 mi (612.40 km) |
| Idrija to Craponne | 447.68 mi (720.47 km) |
| Idrija to Creil | 581.94 mi (936.54 km) |
| Idrija to Crepy-en-Valois | 564.14 mi (907.90 km) |
| Idrija to Crest | 445.67 mi (717.23 km) |
| Idrija to Creteil | 573.48 mi (922.93 km) |
