| Idrija to Robertsville (New Jersey) | 4,231.15 mi (6,809.38 km) |
| Idrija to Robinson (Texas) | 5,576.05 mi (8,973.79 km) |
| Idrija to Robstown (Texas) | 5,788.96 mi (9,316.43 km) |
| Idrija to Rochester (Michigan) | 4,484.18 mi (7,216.58 km) |
| Idrija to Rochester (Minnesota) | 4,769.29 mi (7,675.43 km) |
| Idrija to Rochester (New Hampshire) | 3,972.61 mi (6,393.30 km) |
| Idrija to Rochester (New York) | 4,247.17 mi (6,835.16 km) |
| Idrija to Rochester Hills (Michigan) | 4,486.58 mi (7,220.45 km) |
| Idrija to Rock Hill (South Carolina) | 4,752.56 mi (7,648.51 km) |
| Idrija to Rock Island (Illinois) | 4,823.56 mi (7,762.77 km) |
| Idrija to Rock Springs (Wyoming) | 5,450.57 mi (8,771.85 km) |
| Idrija to Rockford (Illinois) | 4,729.39 mi (7,611.22 km) |
| Idrija to Rockledge (Florida) | 5,051.60 mi (8,129.76 km) |
| Idrija to Rocklin (California) | 5,955.98 mi (9,585.22 km) |
| Idrija to Rockport (Texas) | 5,752.91 mi (9,258.41 km) |
