| Merthyr Tudful to Chantilly (Virginia) | 3,544.37 mi (5,704.11 km) |
| Merthyr Tudful to Chaparral (New Mexico) | 5,019.19 mi (8,077.61 km) |
| Merthyr Tudful to Chapel Hill (North Carolina) | 3,745.04 mi (6,027.07 km) |
| Merthyr Tudful to Charleston (Illinois) | 3,947.84 mi (6,353.44 km) |
| Merthyr Tudful to Charleston (South Carolina) | 3,930.75 mi (6,325.92 km) |
| Merthyr Tudful to Charleston (West Virginia) | 3,739.52 mi (6,018.18 km) |
| Merthyr Tudful to Charlotte (North Carolina) | 3,852.73 mi (6,200.37 km) |
| Merthyr Tudful to Charlottesville (Virginia) | 3,625.29 mi (5,834.34 km) |
| Merthyr Tudful to Chaska (Minnesota) | 3,904.92 mi (6,284.36 km) |
| Merthyr Tudful to Chatham (Illinois) | 3,998.01 mi (6,434.17 km) |
| Merthyr Tudful to Chattanooga (Tennessee) | 4,040.52 mi (6,502.60 km) |
| Merthyr Tudful to Cheat Lake (West Virginia) | 3,607.80 mi (5,806.20 km) |
| Merthyr Tudful to Chelsea (Alabama) | 4,181.13 mi (6,728.87 km) |
| Merthyr Tudful to Chelsea (Massachusetts) | 3,130.45 mi (5,037.98 km) |
| Merthyr Tudful to Cheney (Washington) | 4,557.58 mi (7,334.72 km) |
