| Idrija to Ridgeland (Mississippi) | 5,250.30 mi (8,449.54 km) |
| Idrija to Ridgewood (New Jersey) | 4,196.62 mi (6,753.80 km) |
| Idrija to Rifle (Colorado) | 5,519.51 mi (8,882.79 km) |
| Idrija to Rincon (Georgia) | 4,885.03 mi (7,861.70 km) |
| Idrija to Ringwood (New Jersey) | 4,198.14 mi (6,756.25 km) |
| Idrija to Río Grande (Puerto Rico) | 4,833.25 mi (7,778.36 km) |
| Idrija to Rio Grande City (Texas) | 5,909.28 mi (9,510.07 km) |
| Idrija to Rio Linda (California) | 5,968.29 mi (9,605.03 km) |
| Idrija to Rio Rancho (New Mexico) | 5,718.80 mi (9,203.51 km) |
| Idrija to Rio Rico (Arizona) | 6,076.00 mi (9,778.38 km) |
| Idrija to Ripon (California) | 6,017.03 mi (9,683.47 km) |
| Idrija to River Edge (New Jersey) | 4,195.85 mi (6,752.57 km) |
| Idrija to River Falls (Wisconsin) | 4,733.57 mi (7,617.94 km) |
| Idrija to River Forest (Illinois) | 4,699.99 mi (7,563.90 km) |
| Idrija to River Grove (Illinois) | 4,699.31 mi (7,562.81 km) |
