| Rhondda to Corinth (Mississippi) | 4,179.71 mi (6,726.59 km) |
| Rhondda to Corinth (Texas) | 4,608.88 mi (7,417.27 km) |
| Rhondda to Cornelius (North Carolina) | 3,843.12 mi (6,184.91 km) |
| Rhondda to Cornelius (Oregon) | 4,827.55 mi (7,769.18 km) |
| Rhondda to Corning (New York) | 3,387.53 mi (5,451.70 km) |
| Rhondda to Corona (California) | 5,316.61 mi (8,556.25 km) |
| Rhondda to Coronado (California) | 5,370.27 mi (8,642.62 km) |
| Rhondda to Corpus Christi (Texas) | 4,900.76 mi (7,887.00 km) |
| Rhondda to Corsicana (Texas) | 4,639.45 mi (7,466.48 km) |
| Rhondda to Cortland (New York) | 3,332.92 mi (5,363.81 km) |
| Rhondda to Corvallis (Oregon) | 4,887.64 mi (7,865.90 km) |
| Rhondda to Coshocton (Ohio) | 3,662.87 mi (5,894.83 km) |
| Rhondda to Costa Mesa (California) | 5,339.19 mi (8,592.60 km) |
| Rhondda to Coto de Caza (California) | 5,332.25 mi (8,581.42 km) |
| Rhondda to Cottage Grove (Minnesota) | 3,883.20 mi (6,249.41 km) |
