| Rhondda to Cedar Rapids (Iowa) | 3,968.74 mi (6,387.08 km) |
| Rhondda to Cedarburg (Wisconsin) | 3,767.38 mi (6,063.01 km) |
| Rhondda to Celebration (Florida) | 4,217.65 mi (6,787.65 km) |
| Rhondda to Celina (Ohio) | 3,757.94 mi (6,047.83 km) |
| Rhondda to Celina (Texas) | 4,589.41 mi (7,385.95 km) |
| Rhondda to Centennial (Colorado) | 4,569.44 mi (7,353.81 km) |
| Rhondda to Center Point (Alabama) | 4,168.91 mi (6,709.21 km) |
| Rhondda to Centereach (New York) | 3,279.31 mi (5,277.55 km) |
| Rhondda to Centerton (Arkansas) | 4,339.47 mi (6,983.70 km) |
| Rhondda to Centerville (Ohio) | 3,783.24 mi (6,088.54 km) |
| Rhondda to Centerville (Utah) | 4,739.62 mi (7,627.68 km) |
| Rhondda to Central (Louisiana) | 4,499.22 mi (7,240.80 km) |
| Rhondda to Central Falls (Rhode Island) | 3,166.89 mi (5,096.61 km) |
| Rhondda to Central Islip (New York) | 3,287.54 mi (5,290.78 km) |
| Rhondda to Central Point (Oregon) | 5,001.84 mi (8,049.69 km) |
