| Idrija to Oakley (California) | 6,016.90 mi (9,683.26 km) |
| Idrija to Oakton (Virginia) | 4,418.82 mi (7,111.40 km) |
| Idrija to Oakville (Missouri) | 4,960.21 mi (7,982.69 km) |
| Idrija to Oatfield (Oregon) | 5,590.69 mi (8,997.35 km) |
| Idrija to Ocala (Florida) | 5,072.49 mi (8,163.39 km) |
| Idrija to Ocean Acres (New Jersey) | 4,255.82 mi (6,849.09 km) |
| Idrija to Ocean City (New Jersey) | 4,289.54 mi (6,903.35 km) |
| Idrija to Ocean Pines (Maryland) | 4,350.54 mi (7,001.52 km) |
| Idrija to Ocean Pointe (Hawaii) | 7,759.04 mi (12,486.96 km) |
| Idrija to Ocean Springs (Mississippi) | 5,294.57 mi (8,520.78 km) |
| Idrija to Oceanside (California) | 6,177.32 mi (9,941.43 km) |
| Idrija to Oceanside (New York) | 4,191.40 mi (6,745.40 km) |
| Idrija to Ocoee (Florida) | 5,074.19 mi (8,166.13 km) |
| Idrija to Oconomowoc (Wisconsin) | 4,668.64 mi (7,513.45 km) |
| Idrija to Odenton (Maryland) | 4,385.78 mi (7,058.23 km) |
