| Merthyr Tudful to Frederick (Maryland) | 3,518.75 mi (5,662.87 km) |
| Merthyr Tudful to Fredericksburg (Texas) | 4,825.90 mi (7,766.53 km) |
| Merthyr Tudful to Fredericksburg (Virginia) | 3,572.43 mi (5,749.28 km) |
| Merthyr Tudful to Frederickson (Washington) | 4,714.24 mi (7,586.83 km) |
| Merthyr Tudful to Freeport (Illinois) | 3,873.62 mi (6,233.99 km) |
| Merthyr Tudful to Freeport (New York) | 3,308.51 mi (5,324.53 km) |
| Merthyr Tudful to Freeport (Texas) | 4,755.01 mi (7,652.46 km) |
| Merthyr Tudful to Fremont (California) | 5,245.88 mi (8,442.43 km) |
| Merthyr Tudful to Fremont (Nebraska) | 4,170.61 mi (6,711.95 km) |
| Merthyr Tudful to Fremont (Ohio) | 3,662.89 mi (5,894.85 km) |
| Merthyr Tudful to French Valley (California) | 5,311.83 mi (8,548.56 km) |
| Merthyr Tudful to Fresno (California) | 5,219.87 mi (8,400.57 km) |
| Merthyr Tudful to Fresno (Texas) | 4,728.92 mi (7,610.46 km) |
| Merthyr Tudful to Fridley (Minnesota) | 3,879.84 mi (6,244.00 km) |
| Merthyr Tudful to Friendly (Maryland) | 3,530.26 mi (5,681.41 km) |
