| Llantwit Major to Rockville (Maryland) | 3,526.34 mi (5,675.09 km) |
| Llantwit Major to Rockville Centre (New York) | 3,312.54 mi (5,331.01 km) |
| Llantwit Major to Rockwall (Texas) | 4,599.36 mi (7,401.96 km) |
| Llantwit Major to Rocky Mount (North Carolina) | 3,693.51 mi (5,944.13 km) |
| Llantwit Major to Rocky Point (New York) | 3,272.01 mi (5,265.79 km) |
| Llantwit Major to Rocky River (Ohio) | 3,612.43 mi (5,813.64 km) |
| Llantwit Major to Roessleville (New York) | 3,234.40 mi (5,205.27 km) |
| Llantwit Major to Rogers (Arkansas) | 4,339.72 mi (6,984.11 km) |
| Llantwit Major to Rogers (Minnesota) | 3,895.54 mi (6,269.27 km) |
| Llantwit Major to Rohnert Park (California) | 5,234.05 mi (8,423.40 km) |
| Llantwit Major to Rolla (Missouri) | 4,166.92 mi (6,706.01 km) |
| Llantwit Major to Rolling Meadows (Illinois) | 3,828.38 mi (6,161.18 km) |
| Llantwit Major to Roma (Texas) | 5,037.58 mi (8,107.20 km) |
| Llantwit Major to Rome (Georgia) | 4,079.53 mi (6,565.37 km) |
| Llantwit Major to Rome (New York) | 3,281.71 mi (5,281.41 km) |
