| Rhondda to Centralia (Illinois) | 4,032.27 mi (6,489.31 km) |
| Rhondda to Centralia (Washington) | 4,757.38 mi (7,656.26 km) |
| Rhondda to Centreville (Virginia) | 3,547.10 mi (5,708.51 km) |
| Rhondda to Ceres (California) | 5,215.21 mi (8,393.07 km) |
| Rhondda to Cerritos (California) | 5,333.02 mi (8,582.67 km) |
| Rhondda to Chalco (Nebraska) | 4,173.08 mi (6,715.92 km) |
| Rhondda to Chalmette (Louisiana) | 4,486.52 mi (7,220.35 km) |
| Rhondda to Chambersburg (Pennsylvania) | 3,507.64 mi (5,645.00 km) |
| Rhondda to Chamblee (Georgia) | 4,059.60 mi (6,533.29 km) |
| Rhondda to Champaign (Illinois) | 3,924.19 mi (6,315.37 km) |
| Rhondda to Champlin (Minnesota) | 3,883.84 mi (6,250.43 km) |
| Rhondda to Chandler (Arizona) | 5,152.45 mi (8,292.07 km) |
| Rhondda to Chanhassen (Minnesota) | 3,904.62 mi (6,283.88 km) |
| Rhondda to Channahon (Illinois) | 3,863.21 mi (6,217.23 km) |
| Rhondda to Channelview (Texas) | 4,703.06 mi (7,568.85 km) |
