| Dobrich to Frederick (Maryland) | 5,051.17 mi (8,129.08 km) |
| Dobrich to Fredericksburg (Texas) | 6,324.13 mi (10,177.71 km) |
| Dobrich to Fredericksburg (Virginia) | 5,107.70 mi (8,220.06 km) |
| Dobrich to Frederickson (Washington) | 5,914.27 mi (9,518.09 km) |
| Dobrich to Freeport (Illinois) | 5,354.46 mi (8,617.17 km) |
| Dobrich to Freeport (New York) | 4,844.39 mi (7,796.29 km) |
| Dobrich to Freeport (Texas) | 6,272.13 mi (10,094.02 km) |
| Dobrich to Fremont (California) | 6,523.22 mi (10,498.11 km) |
| Dobrich to Fremont (Nebraska) | 5,622.84 mi (9,049.08 km) |
| Dobrich to Fremont (Ohio) | 5,173.46 mi (8,325.89 km) |
| Dobrich to French Valley (California) | 6,665.15 mi (10,726.52 km) |
| Dobrich to Fresno (California) | 6,525.28 mi (10,501.43 km) |
| Dobrich to Fresno (Texas) | 6,243.68 mi (10,048.23 km) |
| Dobrich to Fridley (Minnesota) | 5,324.66 mi (8,569.21 km) |
| Dobrich to Friendly (Maryland) | 5,065.30 mi (8,151.81 km) |
