| Llantrisant to Rockville (Maryland) | 3,527.78 mi (5,677.41 km) |
| Llantrisant to Rockville Centre (New York) | 3,314.08 mi (5,333.50 km) |
| Llantrisant to Rockwall (Texas) | 4,599.48 mi (7,402.15 km) |
| Llantrisant to Rocky Mount (North Carolina) | 3,695.40 mi (5,947.18 km) |
| Llantrisant to Rocky Point (New York) | 3,273.58 mi (5,268.32 km) |
| Llantrisant to Rocky River (Ohio) | 3,612.93 mi (5,814.44 km) |
| Llantrisant to Roessleville (New York) | 3,235.54 mi (5,207.09 km) |
| Llantrisant to Rogers (Arkansas) | 4,339.65 mi (6,983.98 km) |
| Llantrisant to Rogers (Minnesota) | 3,894.19 mi (6,267.09 km) |
| Llantrisant to Rohnert Park (California) | 5,230.45 mi (8,417.59 km) |
| Llantrisant to Rolla (Missouri) | 4,166.88 mi (6,705.95 km) |
| Llantrisant to Rolling Meadows (Illinois) | 3,828.11 mi (6,160.75 km) |
| Llantrisant to Roma (Texas) | 5,038.20 mi (8,108.20 km) |
| Llantrisant to Rome (Georgia) | 4,080.81 mi (6,567.43 km) |
| Llantrisant to Rome (New York) | 3,282.57 mi (5,282.78 km) |
