| Idrija to Crest Hill (Illinois) | 4,726.24 mi (7,606.15 km) |
| Idrija to Crestview (Florida) | 5,185.73 mi (8,345.63 km) |
| Idrija to Crestwood (Illinois) | 4,708.71 mi (7,577.94 km) |
| Idrija to Crestwood (Missouri) | 4,957.14 mi (7,977.74 km) |
| Idrija to Creve Coeur (Missouri) | 4,954.48 mi (7,973.47 km) |
| Idrija to Crofton (Maryland) | 4,387.46 mi (7,060.93 km) |
| Idrija to Crossville (Tennessee) | 4,870.95 mi (7,839.03 km) |
| Idrija to Crowley (Louisiana) | 5,451.36 mi (8,773.12 km) |
| Idrija to Crowley (Texas) | 5,526.44 mi (8,893.95 km) |
| Idrija to Crown Point (Indiana) | 4,704.62 mi (7,571.36 km) |
| Idrija to Crystal (Minnesota) | 4,750.65 mi (7,645.43 km) |
| Idrija to Crystal Lake (Illinois) | 4,703.44 mi (7,569.46 km) |
| Idrija to Cudahy (California) | 6,159.76 mi (9,913.18 km) |
| Idrija to Cudahy (Wisconsin) | 4,652.38 mi (7,487.28 km) |
| Idrija to Cullman (Alabama) | 5,029.78 mi (8,094.65 km) |
