| Llantrisant to Firestone (Colorado) | 4,547.71 mi (7,318.83 km) |
| Llantrisant to Fish Hawk (Florida) | 4,271.33 mi (6,874.04 km) |
| Llantrisant to Fishers (Indiana) | 3,844.37 mi (6,186.91 km) |
| Llantrisant to Fitchburg (Massachusetts) | 3,158.75 mi (5,083.51 km) |
| Llantrisant to Fitchburg (Wisconsin) | 3,840.26 mi (6,180.30 km) |
| Llantrisant to Five Corners (Washington) | 4,809.74 mi (7,740.52 km) |
| Llantrisant to Five Forks (South Carolina) | 3,933.23 mi (6,329.93 km) |
| Llantrisant to Flagstaff (Arizona) | 5,044.90 mi (8,118.99 km) |
| Llantrisant to Flat Rock (Michigan) | 3,641.50 mi (5,860.43 km) |
| Llantrisant to Fleming Island (Florida) | 4,138.86 mi (6,660.86 km) |
| Llantrisant to Flint (Michigan) | 3,617.42 mi (5,821.67 km) |
| Llantrisant to Floral Park (New York) | 3,314.27 mi (5,333.80 km) |
| Llantrisant to Florence (Alabama) | 4,154.58 mi (6,686.15 km) |
| Llantrisant to Florence (Arizona) | 5,153.81 mi (8,294.26 km) |
| Llantrisant to Florence (Kentucky) | 3,836.42 mi (6,174.12 km) |
