| Rhondda to Crest Hill (Illinois) | 3,850.56 mi (6,196.88 km) |
| Rhondda to Crestview (Florida) | 4,306.92 mi (6,931.31 km) |
| Rhondda to Crestwood (Illinois) | 3,832.79 mi (6,168.28 km) |
| Rhondda to Crestwood (Missouri) | 4,079.82 mi (6,565.83 km) |
| Rhondda to Creve Coeur (Missouri) | 4,077.33 mi (6,561.82 km) |
| Rhondda to Crofton (Maryland) | 3,508.06 mi (5,645.68 km) |
| Rhondda to Crossville (Tennessee) | 3,990.47 mi (6,422.04 km) |
| Rhondda to Crowley (Louisiana) | 4,570.85 mi (7,356.08 km) |
| Rhondda to Crowley (Texas) | 4,649.10 mi (7,482.01 km) |
| Rhondda to Crown Point (Indiana) | 3,828.07 mi (6,160.68 km) |
| Rhondda to Crystal (Minnesota) | 3,888.82 mi (6,258.45 km) |
| Rhondda to Crystal Lake (Illinois) | 3,828.92 mi (6,162.05 km) |
| Rhondda to Cudahy (California) | 5,331.45 mi (8,580.13 km) |
| Rhondda to Cudahy (Wisconsin) | 3,778.49 mi (6,080.89 km) |
| Rhondda to Cullman (Alabama) | 4,149.35 mi (6,677.73 km) |
