| Rhondda to Clermont (Florida) | 4,213.78 mi (6,781.42 km) |
| Rhondda to Cleveland (Mississippi) | 4,327.70 mi (6,964.77 km) |
| Rhondda to Cleveland (Ohio) | 3,602.21 mi (5,797.19 km) |
| Rhondda to Cleveland (Tennessee) | 4,020.72 mi (6,470.73 km) |
| Rhondda to Cleveland Heights (Ohio) | 3,596.01 mi (5,787.21 km) |
| Rhondda to Cliffside Park (New Jersey) | 3,318.61 mi (5,340.79 km) |
| Rhondda to Clifton (Colorado) | 4,722.23 mi (7,599.69 km) |
| Rhondda to Clifton (New Jersey) | 3,323.86 mi (5,349.23 km) |
| Rhondda to Clinton (Iowa) | 3,919.85 mi (6,308.39 km) |
| Rhondda to Clinton (Maryland) | 3,529.13 mi (5,679.59 km) |
| Rhondda to Clinton (Mississippi) | 4,381.03 mi (7,050.59 km) |
| Rhondda to Clinton (Utah) | 4,734.28 mi (7,619.09 km) |
| Rhondda to Clive (Iowa) | 4,065.14 mi (6,542.21 km) |
| Rhondda to Cloquet (Minnesota) | 3,780.86 mi (6,084.71 km) |
| Rhondda to Cloverleaf (Texas) | 4,705.55 mi (7,572.85 km) |
