| Idrija to Frederick (Maryland) | 4,399.63 mi (7,080.53 km) |
| Idrija to Fredericksburg (Texas) | 5,705.91 mi (9,182.78 km) |
| Idrija to Fredericksburg (Virginia) | 4,452.47 mi (7,165.56 km) |
| Idrija to Frederickson (Washington) | 5,483.84 mi (8,825.38 km) |
| Idrija to Freeport (Illinois) | 4,749.17 mi (7,643.04 km) |
| Idrija to Freeport (New York) | 4,188.47 mi (6,740.69 km) |
| Idrija to Freeport (Texas) | 5,636.85 mi (9,071.63 km) |
| Idrija to Fremont (California) | 6,052.74 mi (9,740.94 km) |
| Idrija to Fremont (Nebraska) | 5,038.68 mi (8,108.98 km) |
| Idrija to Fremont (Ohio) | 4,544.01 mi (7,312.87 km) |
| Idrija to French Valley (California) | 6,149.14 mi (9,896.09 km) |
| Idrija to Fresno (California) | 6,038.07 mi (9,717.33 km) |
| Idrija to Fresno (Texas) | 5,610.66 mi (9,029.49 km) |
| Idrija to Fridley (Minnesota) | 4,744.91 mi (7,636.19 km) |
| Idrija to Friendly (Maryland) | 4,410.41 mi (7,097.86 km) |
