| Llantrisant to Frederick (Maryland) | 3,522.94 mi (5,669.62 km) |
| Llantrisant to Fredericksburg (Texas) | 4,831.60 mi (7,775.71 km) |
| Llantrisant to Fredericksburg (Virginia) | 3,576.38 mi (5,755.63 km) |
| Llantrisant to Frederickson (Washington) | 4,724.98 mi (7,604.12 km) |
| Llantrisant to Freeport (Illinois) | 3,880.09 mi (6,244.40 km) |
| Llantrisant to Freeport (New York) | 3,312.43 mi (5,330.84 km) |
| Llantrisant to Freeport (Texas) | 4,759.96 mi (7,660.42 km) |
| Llantrisant to Fremont (California) | 5,255.65 mi (8,458.15 km) |
| Llantrisant to Fremont (Nebraska) | 4,177.79 mi (6,723.51 km) |
| Llantrisant to Fremont (Ohio) | 3,668.31 mi (5,903.58 km) |
| Llantrisant to French Valley (California) | 5,320.57 mi (8,562.63 km) |
| Llantrisant to Fresno (California) | 5,229.30 mi (8,415.74 km) |
| Llantrisant to Fresno (Texas) | 4,733.98 mi (7,618.60 km) |
| Llantrisant to Fridley (Minnesota) | 3,887.27 mi (6,255.96 km) |
| Llantrisant to Friendly (Maryland) | 3,534.23 mi (5,687.80 km) |
