| Rhondda to Ridgeland (Mississippi) | 4,369.79 mi (7,032.49 km) |
| Rhondda to Ridgewood (New Jersey) | 3,316.95 mi (5,338.11 km) |
| Rhondda to Rifle (Colorado) | 4,674.21 mi (7,522.42 km) |
| Rhondda to Rincon (Georgia) | 4,009.09 mi (6,452.01 km) |
| Rhondda to Ringwood (New Jersey) | 3,318.33 mi (5,340.33 km) |
| Rhondda to Río Grande (Puerto Rico) | 4,053.74 mi (6,523.86 km) |
| Rhondda to Rio Grande City (Texas) | 5,029.15 mi (8,093.64 km) |
| Rhondda to Rio Linda (California) | 5,167.93 mi (8,316.98 km) |
| Rhondda to Rio Rancho (New Mexico) | 4,860.23 mi (7,821.79 km) |
| Rhondda to Rio Rico (Arizona) | 5,219.39 mi (8,399.80 km) |
| Rhondda to Ripon (California) | 5,212.14 mi (8,388.12 km) |
| Rhondda to River Edge (New Jersey) | 3,316.25 mi (5,336.99 km) |
| Rhondda to River Falls (Wisconsin) | 3,870.05 mi (6,228.25 km) |
| Rhondda to River Forest (Illinois) | 3,824.48 mi (6,154.90 km) |
| Rhondda to River Grove (Illinois) | 3,823.86 mi (6,153.90 km) |
