| Idrija to Carlsbad (New Mexico) | 5,791.11 mi (9,319.89 km) |
| Idrija to Carmel (Indiana) | 4,726.38 mi (7,606.38 km) |
| Idrija to Carmichael (California) | 5,968.61 mi (9,605.54 km) |
| Idrija to Carney (Maryland) | 4,363.97 mi (7,023.12 km) |
| Idrija to Carnot-Moon (Pennsylvania) | 4,466.29 mi (7,187.80 km) |
| Idrija to Carol Stream (Illinois) | 4,710.63 mi (7,581.02 km) |
| Idrija to Carolina (Puerto Rico) | 4,838.69 mi (7,787.12 km) |
| Idrija to Carolina Forest (South Carolina) | 4,717.16 mi (7,591.54 km) |
| Idrija to Carpentersville (Illinois) | 4,706.95 mi (7,575.10 km) |
| Idrija to Carpinteria (California) | 6,172.67 mi (9,933.96 km) |
| Idrija to Carrboro (North Carolina) | 4,625.89 mi (7,444.65 km) |
| Idrija to Carroll (Iowa) | 4,949.59 mi (7,965.60 km) |
| Idrija to Carrollton (Georgia) | 4,986.17 mi (8,024.46 km) |
| Idrija to Carrollton (Texas) | 5,487.53 mi (8,831.33 km) |
| Idrija to Carrollwood (Florida) | 5,142.18 mi (8,275.54 km) |
