| Sliven to Frederick (Maryland) | 5,030.05 mi (8,095.08 km) |
| Sliven to Fredericksburg (Texas) | 6,314.86 mi (10,162.79 km) |
| Sliven to Fredericksburg (Virginia) | 5,085.20 mi (8,183.84 km) |
| Sliven to Frederickson (Washington) | 5,945.26 mi (9,567.97 km) |
| Sliven to Freeport (Illinois) | 5,348.18 mi (8,607.06 km) |
| Sliven to Freeport (New York) | 4,821.49 mi (7,759.44 km) |
| Sliven to Freeport (Texas) | 6,257.42 mi (10,070.34 km) |
| Sliven to Fremont (California) | 6,547.98 mi (10,537.96 km) |
| Sliven to Fremont (Nebraska) | 5,622.36 mi (9,048.32 km) |
| Sliven to Fremont (Ohio) | 5,159.95 mi (8,304.14 km) |
| Sliven to French Valley (California) | 6,681.22 mi (10,752.39 km) |
| Sliven to Fresno (California) | 6,546.91 mi (10,536.23 km) |
| Sliven to Fresno (Texas) | 6,229.70 mi (10,025.74 km) |
| Sliven to Fridley (Minnesota) | 5,325.00 mi (8,569.77 km) |
| Sliven to Friendly (Maryland) | 5,042.91 mi (8,115.78 km) |
