| Idrija to Clermont (Florida) | 5,084.66 mi (8,182.96 km) |
| Idrija to Cleveland (Mississippi) | 5,207.95 mi (8,381.39 km) |
| Idrija to Cleveland (Ohio) | 4,482.03 mi (7,213.13 km) |
| Idrija to Cleveland (Tennessee) | 4,901.04 mi (7,887.46 km) |
| Idrija to Cleveland Heights (Ohio) | 4,475.85 mi (7,203.19 km) |
| Idrija to Cliffside Park (New Jersey) | 4,198.12 mi (6,756.22 km) |
| Idrija to Clifton (Colorado) | 5,566.94 mi (8,959.12 km) |
| Idrija to Clifton (New Jersey) | 4,203.46 mi (6,764.82 km) |
| Idrija to Clinton (Iowa) | 4,792.93 mi (7,713.48 km) |
| Idrija to Clinton (Maryland) | 4,408.44 mi (7,094.70 km) |
| Idrija to Clinton (Mississippi) | 5,261.54 mi (8,467.63 km) |
| Idrija to Clinton (Utah) | 5,561.82 mi (8,950.89 km) |
| Idrija to Clive (Iowa) | 4,934.04 mi (7,940.58 km) |
| Idrija to Cloquet (Minnesota) | 4,639.60 mi (7,466.71 km) |
| Idrija to Cloverleaf (Texas) | 5,585.77 mi (8,989.43 km) |
