| Idrija to Cloverly (Maryland) | 4,396.74 mi (7,075.87 km) |
| Idrija to Clovis (California) | 6,032.31 mi (9,708.06 km) |
| Idrija to Clovis (New Mexico) | 5,643.28 mi (9,081.98 km) |
| Idrija to Clute (Texas) | 5,634.19 mi (9,067.35 km) |
| Idrija to Coachella (California) | 6,114.60 mi (9,840.50 km) |
| Idrija to Coalinga (California) | 6,091.15 mi (9,802.76 km) |
| Idrija to Coamo (Puerto Rico) | 4,872.64 mi (7,841.76 km) |
| Idrija to Coatesville (Pennsylvania) | 4,309.74 mi (6,935.85 km) |
| Idrija to Cockeysville (Maryland) | 4,365.09 mi (7,024.94 km) |
| Idrija to Cocoa (Florida) | 5,050.04 mi (8,127.26 km) |
| Idrija to Cocoa Beach (Florida) | 5,046.23 mi (8,121.12 km) |
| Idrija to Coconut Creek (Florida) | 5,124.71 mi (8,247.43 km) |
| Idrija to Coeur d'Alene (Idaho) | 5,313.78 mi (8,551.71 km) |
| Idrija to Cohoes (New York) | 4,105.84 mi (6,607.71 km) |
| Idrija to Cold Springs (Nevada) | 5,869.14 mi (9,445.47 km) |
