| Cwmbran to Rockville (Maryland) | 3,540.13 mi (5,697.29 km) |
| Cwmbran to Rockville Centre (New York) | 3,326.56 mi (5,353.59 km) |
| Cwmbran to Rockwall (Texas) | 4,610.22 mi (7,419.43 km) |
| Cwmbran to Rocky Mount (North Carolina) | 3,708.26 mi (5,967.87 km) |
| Cwmbran to Rocky Point (New York) | 3,286.09 mi (5,288.46 km) |
| Cwmbran to Rocky River (Ohio) | 3,624.15 mi (5,832.51 km) |
| Cwmbran to Roessleville (New York) | 3,247.54 mi (5,226.42 km) |
| Cwmbran to Rogers (Arkansas) | 4,350.14 mi (7,000.87 km) |
| Cwmbran to Rogers (Minnesota) | 3,902.95 mi (6,281.19 km) |
| Cwmbran to Rohnert Park (California) | 5,235.70 mi (8,426.05 km) |
| Cwmbran to Rolla (Missouri) | 4,177.43 mi (6,722.92 km) |
| Cwmbran to Rolling Meadows (Illinois) | 3,838.36 mi (6,177.24 km) |
| Cwmbran to Roma (Texas) | 5,049.57 mi (8,126.50 km) |
| Cwmbran to Rome (Georgia) | 4,092.98 mi (6,587.01 km) |
| Cwmbran to Rome (New York) | 3,294.23 mi (5,301.56 km) |
