| Idrija to Caño Martin Peña (Puerto Rico) | 4,840.89 mi (7,790.67 km) |
| Idrija to Cañon City (Colorado) | 5,496.11 mi (8,845.14 km) |
| Idrija to Canóvanas (Puerto Rico) | 4,836.66 mi (7,783.86 km) |
| Idrija to Canton (Georgia) | 4,929.80 mi (7,933.74 km) |
| Idrija to Canton (Illinois) | 4,847.05 mi (7,800.57 km) |
| Idrija to Canton (Mississippi) | 5,236.94 mi (8,428.04 km) |
| Idrija to Canton (Ohio) | 4,499.48 mi (7,241.21 km) |
| Idrija to Canyon (Texas) | 5,568.07 mi (8,960.95 km) |
| Idrija to Canyon Lake (California) | 6,148.59 mi (9,895.20 km) |
| Idrija to Canyon Lake (Texas) | 5,702.71 mi (9,177.63 km) |
| Idrija to Cape Coral (Florida) | 5,187.59 mi (8,348.62 km) |
| Idrija to Cape Girardeau (Missouri) | 4,986.24 mi (8,024.57 km) |
| Idrija to Carbondale (Illinois) | 4,953.16 mi (7,971.35 km) |
| Idrija to Carlisle (Pennsylvania) | 4,357.61 mi (7,012.89 km) |
| Idrija to Carlsbad (California) | 6,182.47 mi (9,949.72 km) |
