| Merthyr Tudful to Felida (Washington) | 4,801.47 mi (7,727.22 km) |
| Merthyr Tudful to Fenton (Michigan) | 3,622.30 mi (5,829.52 km) |
| Merthyr Tudful to Fergus Falls (Minnesota) | 3,925.15 mi (6,316.93 km) |
| Merthyr Tudful to Ferguson (Missouri) | 4,065.30 mi (6,542.47 km) |
| Merthyr Tudful to Fernandina Beach (Florida) | 4,097.56 mi (6,594.38 km) |
| Merthyr Tudful to Ferndale (Maryland) | 3,497.67 mi (5,628.95 km) |
| Merthyr Tudful to Ferndale (Michigan) | 3,614.47 mi (5,816.92 km) |
| Merthyr Tudful to Ferndale (Washington) | 4,621.79 mi (7,438.06 km) |
| Merthyr Tudful to Fernley (Nevada) | 5,044.17 mi (8,117.81 km) |
| Merthyr Tudful to Ferry Pass (Florida) | 4,342.70 mi (6,988.91 km) |
| Merthyr Tudful to Festus (Missouri) | 4,095.13 mi (6,590.48 km) |
| Merthyr Tudful to Fife (Washington) | 4,706.08 mi (7,573.70 km) |
| Merthyr Tudful to Fillmore (California) | 5,326.67 mi (8,572.45 km) |
| Merthyr Tudful to Findlay (Ohio) | 3,697.33 mi (5,950.28 km) |
| Merthyr Tudful to Finneytown (Ohio) | 3,815.55 mi (6,140.53 km) |
