| Risca to Ridgeland (Mississippi) | 4,383.18 mi (7,054.05 km) |
| Risca to Ridgewood (New Jersey) | 3,330.52 mi (5,359.96 km) |
| Risca to Rifle (Colorado) | 4,685.84 mi (7,541.13 km) |
| Risca to Rincon (Georgia) | 4,022.85 mi (6,474.16 km) |
| Risca to Ringwood (New Jersey) | 3,331.89 mi (5,362.16 km) |
| Risca to Río Grande (Puerto Rico) | 4,067.44 mi (6,545.92 km) |
| Risca to Rio Grande City (Texas) | 5,042.42 mi (8,114.99 km) |
| Risca to Rio Linda (California) | 5,178.30 mi (8,333.66 km) |
| Risca to Rio Rancho (New Mexico) | 4,872.33 mi (7,841.26 km) |
| Risca to Rio Rico (Arizona) | 5,231.44 mi (8,419.18 km) |
| Risca to Ripon (California) | 5,222.63 mi (8,405.01 km) |
| Risca to River Edge (New Jersey) | 3,329.83 mi (5,358.85 km) |
| Risca to River Falls (Wisconsin) | 3,882.30 mi (6,247.96 km) |
| Risca to River Forest (Illinois) | 3,837.32 mi (6,175.57 km) |
| Risca to River Grove (Illinois) | 3,836.69 mi (6,174.56 km) |
