| Sofia to Frederick (Maryland) | 4,908.26 mi (7,899.07 km) |
| Sofia to Fredericksburg (Texas) | 6,204.48 mi (9,985.14 km) |
| Sofia to Fredericksburg (Virginia) | 4,962.05 mi (7,985.64 km) |
| Sofia to Frederickson (Washington) | 5,887.76 mi (9,475.44 km) |
| Sofia to Freeport (Illinois) | 5,241.80 mi (8,435.86 km) |
| Sofia to Freeport (New York) | 4,698.11 mi (7,560.87 km) |
| Sofia to Freeport (Texas) | 6,141.31 mi (9,883.48 km) |
| Sofia to Fremont (California) | 6,480.56 mi (10,429.45 km) |
| Sofia to Fremont (Nebraska) | 5,522.50 mi (8,887.61 km) |
| Sofia to Fremont (Ohio) | 5,045.80 mi (8,120.42 km) |
| Sofia to French Valley (California) | 6,601.47 mi (10,624.05 km) |
| Sofia to Fresno (California) | 6,474.98 mi (10,420.48 km) |
| Sofia to Fresno (Texas) | 6,114.37 mi (9,840.13 km) |
| Sofia to Fridley (Minnesota) | 5,226.36 mi (8,411.02 km) |
| Sofia to Friendly (Maryland) | 4,919.88 mi (7,917.79 km) |
