| Rhondda to Chantilly (Virginia) | 3,545.24 mi (5,705.50 km) |
| Rhondda to Chaparral (New Mexico) | 5,022.13 mi (8,082.34 km) |
| Rhondda to Chapel Hill (North Carolina) | 3,745.64 mi (6,028.03 km) |
| Rhondda to Charleston (Illinois) | 3,949.84 mi (6,356.66 km) |
| Rhondda to Charleston (South Carolina) | 3,931.01 mi (6,326.35 km) |
| Rhondda to Charleston (West Virginia) | 3,740.73 mi (6,020.12 km) |
| Rhondda to Charlotte (North Carolina) | 3,853.41 mi (6,201.47 km) |
| Rhondda to Charlottesville (Virginia) | 3,626.13 mi (5,835.70 km) |
| Rhondda to Chaska (Minnesota) | 3,908.10 mi (6,289.48 km) |
| Rhondda to Chatham (Illinois) | 4,000.17 mi (6,437.65 km) |
| Rhondda to Chattanooga (Tennessee) | 4,041.65 mi (6,504.40 km) |
| Rhondda to Cheat Lake (West Virginia) | 3,609.03 mi (5,808.17 km) |
| Rhondda to Chelsea (Alabama) | 4,182.17 mi (6,730.55 km) |
| Rhondda to Chelsea (Massachusetts) | 3,131.27 mi (5,039.29 km) |
| Rhondda to Cheney (Washington) | 4,562.92 mi (7,343.31 km) |
