| Rhondda to Carlsbad (New Mexico) | 4,922.23 mi (7,921.56 km) |
| Rhondda to Carmel (Indiana) | 3,847.53 mi (6,192.00 km) |
| Rhondda to Carmichael (California) | 5,167.56 mi (8,316.38 km) |
| Rhondda to Carney (Maryland) | 3,484.37 mi (5,607.55 km) |
| Rhondda to Carnot-Moon (Pennsylvania) | 3,585.82 mi (5,770.82 km) |
| Rhondda to Carol Stream (Illinois) | 3,835.44 mi (6,172.54 km) |
| Rhondda to Carolina (Puerto Rico) | 4,058.27 mi (6,531.15 km) |
| Rhondda to Carolina Forest (South Carolina) | 3,841.68 mi (6,182.58 km) |
| Rhondda to Carpentersville (Illinois) | 3,832.22 mi (6,167.36 km) |
| Rhondda to Carpinteria (California) | 5,350.62 mi (8,610.99 km) |
| Rhondda to Carrboro (North Carolina) | 3,747.72 mi (6,031.37 km) |
| Rhondda to Carroll (Iowa) | 4,083.24 mi (6,571.34 km) |
| Rhondda to Carrollton (Georgia) | 4,106.39 mi (6,608.59 km) |
| Rhondda to Carrollton (Texas) | 4,610.18 mi (7,419.36 km) |
| Rhondda to Carrollwood (Florida) | 4,270.91 mi (6,873.37 km) |
