| Idrija to Fortuna Foothills (Arizona) | 6,120.26 mi (9,849.60 km) |
| Idrija to Foster City (California) | 6,058.43 mi (9,750.10 km) |
| Idrija to Fostoria (Ohio) | 4,564.44 mi (7,345.75 km) |
| Idrija to Fountain (Colorado) | 5,464.83 mi (8,794.79 km) |
| Idrija to Fountain Hills (Arizona) | 5,980.62 mi (9,624.88 km) |
| Idrija to Fountain Inn (South Carolina) | 4,813.18 mi (7,746.07 km) |
| Idrija to Fountain Valley (California) | 6,167.86 mi (9,926.22 km) |
| Idrija to Fountainebleau (Florida) | 5,156.33 mi (8,298.31 km) |
| Idrija to Four Corners (Oregon) | 5,628.86 mi (9,058.78 km) |
| Idrija to Four Corners (Texas) | 5,611.24 mi (9,030.42 km) |
| Idrija to Four Square Mile (Colorado) | 5,417.88 mi (8,719.24 km) |
| Idrija to Fox Crossing (Wisconsin) | 4,615.40 mi (7,427.76 km) |
| Idrija to Fox Lake (Illinois) | 4,688.84 mi (7,545.95 km) |
| Idrija to Framingham (Massachusetts) | 4,031.04 mi (6,487.34 km) |
| Idrija to Franconia (Virginia) | 4,418.16 mi (7,110.34 km) |
