| Llantrisant to Red Bank (New Jersey) | 3,345.30 mi (5,383.74 km) |
| Llantrisant to Red Bank (Tennessee) | 4,044.75 mi (6,509.40 km) |
| Llantrisant to Red Bluff (California) | 5,112.50 mi (8,227.77 km) |
| Llantrisant to Red Hill (South Carolina) | 3,848.10 mi (6,192.92 km) |
| Llantrisant to Red Oak (Texas) | 4,633.35 mi (7,456.66 km) |
| Llantrisant to Red Wing (Minnesota) | 3,886.28 mi (6,254.36 km) |
| Llantrisant to Redan (Georgia) | 4,064.15 mi (6,540.62 km) |
| Llantrisant to Redding (California) | 5,093.62 mi (8,197.40 km) |
| Llantrisant to Redland (Maryland) | 3,525.18 mi (5,673.22 km) |
| Llantrisant to Redlands (California) | 5,297.43 mi (8,525.39 km) |
| Llantrisant to Redmond (Oregon) | 4,850.30 mi (7,805.81 km) |
| Llantrisant to Redmond (Washington) | 4,685.59 mi (7,540.73 km) |
| Llantrisant to Redondo Beach (California) | 5,348.46 mi (8,607.51 km) |
| Llantrisant to Redwood City (California) | 5,264.44 mi (8,472.30 km) |
| Llantrisant to Reedley (California) | 5,228.64 mi (8,414.69 km) |
