| Merthyr Tudful to Cedar Rapids (Iowa) | 3,966.10 mi (6,382.82 km) |
| Merthyr Tudful to Cedarburg (Wisconsin) | 3,764.88 mi (6,058.99 km) |
| Merthyr Tudful to Celebration (Florida) | 4,217.79 mi (6,787.88 km) |
| Merthyr Tudful to Celina (Ohio) | 3,756.14 mi (6,044.93 km) |
| Merthyr Tudful to Celina (Texas) | 4,587.32 mi (7,382.57 km) |
| Merthyr Tudful to Centennial (Colorado) | 4,565.89 mi (7,348.09 km) |
| Merthyr Tudful to Center Point (Alabama) | 4,167.82 mi (6,707.45 km) |
| Merthyr Tudful to Centereach (New York) | 3,278.56 mi (5,276.34 km) |
| Merthyr Tudful to Centerton (Arkansas) | 4,337.27 mi (6,980.17 km) |
| Merthyr Tudful to Centerville (Ohio) | 3,781.61 mi (6,085.91 km) |
| Merthyr Tudful to Centerville (Utah) | 4,735.32 mi (7,620.76 km) |
| Merthyr Tudful to Central (Louisiana) | 4,498.04 mi (7,238.90 km) |
| Merthyr Tudful to Central Falls (Rhode Island) | 3,166.13 mi (5,095.39 km) |
| Merthyr Tudful to Central Islip (New York) | 3,286.79 mi (5,289.57 km) |
| Merthyr Tudful to Central Point (Oregon) | 4,996.50 mi (8,041.09 km) |
