| Idrija to Clarkston (Georgia) | 4,940.14 mi (7,950.39 km) |
| Idrija to Clarksville (Indiana) | 4,788.66 mi (7,706.60 km) |
| Idrija to Clarksville (Tennessee) | 4,934.66 mi (7,941.57 km) |
| Idrija to Clawson (Michigan) | 4,492.08 mi (7,229.31 km) |
| Idrija to Clay (Alabama) | 5,043.63 mi (8,116.95 km) |
| Idrija to Clayton (California) | 6,026.27 mi (9,698.35 km) |
| Idrija to Clayton (Missouri) | 4,951.03 mi (7,967.92 km) |
| Idrija to Clayton (North Carolina) | 4,611.01 mi (7,420.70 km) |
| Idrija to Clayton (Ohio) | 4,659.63 mi (7,498.94 km) |
| Idrija to Clearfield (Utah) | 5,562.66 mi (8,952.24 km) |
| Idrija to Clearlake (California) | 5,982.83 mi (9,628.44 km) |
| Idrija to Clearwater (Florida) | 5,156.78 mi (8,299.04 km) |
| Idrija to Cleburne (Texas) | 5,540.14 mi (8,916.00 km) |
| Idrija to Clemmons (North Carolina) | 4,675.59 mi (7,524.63 km) |
| Idrija to Clemson (South Carolina) | 4,839.45 mi (7,788.34 km) |
