| Risca to Rockville (Maryland) | 3,538.15 mi (5,694.10 km) |
| Risca to Rockville Centre (New York) | 3,324.54 mi (5,350.33 km) |
| Risca to Rockwall (Texas) | 4,608.76 mi (7,417.07 km) |
| Risca to Rocky Mount (North Carolina) | 3,706.12 mi (5,964.42 km) |
| Risca to Rocky Point (New York) | 3,284.06 mi (5,285.19 km) |
| Risca to Rocky River (Ohio) | 3,622.53 mi (5,829.91 km) |
| Risca to Roessleville (New York) | 3,245.68 mi (5,223.41 km) |
| Risca to Rogers (Arkansas) | 4,348.75 mi (6,998.63 km) |
| Risca to Rogers (Minnesota) | 3,902.07 mi (6,279.78 km) |
| Risca to Rohnert Park (California) | 5,235.80 mi (8,426.21 km) |
| Risca to Rolla (Missouri) | 4,176.02 mi (6,720.66 km) |
| Risca to Rolling Meadows (Illinois) | 3,837.04 mi (6,175.12 km) |
| Risca to Roma (Texas) | 5,047.91 mi (8,123.83 km) |
| Risca to Rome (Georgia) | 4,091.06 mi (6,583.93 km) |
| Risca to Rome (New York) | 3,292.48 mi (5,298.73 km) |
