| Penarth to Ridgeland (Mississippi) | 4,384.09 mi (7,055.52 km) |
| Penarth to Ridgewood (New Jersey) | 3,330.83 mi (5,360.45 km) |
| Penarth to Rifle (Colorado) | 4,690.39 mi (7,548.45 km) |
| Penarth to Rincon (Georgia) | 4,022.38 mi (6,473.40 km) |
| Penarth to Ringwood (New Jersey) | 3,332.25 mi (5,362.74 km) |
| Penarth to Río Grande (Puerto Rico) | 4,062.02 mi (6,537.19 km) |
| Penarth to Rio Grande City (Texas) | 5,043.70 mi (8,117.05 km) |
| Penarth to Rio Linda (California) | 5,184.52 mi (8,343.68 km) |
| Penarth to Rio Rancho (New Mexico) | 4,876.12 mi (7,847.35 km) |
| Penarth to Rio Rico (Arizona) | 5,235.32 mi (8,425.43 km) |
| Penarth to Ripon (California) | 5,228.70 mi (8,414.79 km) |
| Penarth to River Edge (New Jersey) | 3,330.11 mi (5,359.30 km) |
| Penarth to River Falls (Wisconsin) | 3,885.83 mi (6,253.63 km) |
| Penarth to River Forest (Illinois) | 3,839.66 mi (6,179.34 km) |
| Penarth to River Grove (Illinois) | 3,839.04 mi (6,178.34 km) |
