| Merthyr Tudful to Coldwater (Michigan) | 3,710.40 mi (5,971.32 km) |
| Merthyr Tudful to Colesville (Maryland) | 3,517.83 mi (5,661.40 km) |
| Merthyr Tudful to College (Alaska) | 4,159.38 mi (6,693.87 km) |
| Merthyr Tudful to College Park (Georgia) | 4,077.42 mi (6,561.97 km) |
| Merthyr Tudful to College Park (Maryland) | 3,518.49 mi (5,662.47 km) |
| Merthyr Tudful to College Station (Texas) | 4,707.71 mi (7,576.33 km) |
| Merthyr Tudful to Collegedale (Tennessee) | 4,033.06 mi (6,490.58 km) |
| Merthyr Tudful to Colleyville (Texas) | 4,622.80 mi (7,439.68 km) |
| Merthyr Tudful to Collierville (Tennessee) | 4,220.83 mi (6,792.77 km) |
| Merthyr Tudful to Collinsville (Illinois) | 4,057.49 mi (6,529.89 km) |
| Merthyr Tudful to Colonia (New Jersey) | 3,341.05 mi (5,376.90 km) |
| Merthyr Tudful to Colonial Heights (Virginia) | 3,615.53 mi (5,818.63 km) |
| Merthyr Tudful to Colonial Park (Pennsylvania) | 3,455.85 mi (5,561.65 km) |
| Merthyr Tudful to Colorado Springs (Colorado) | 4,599.63 mi (7,402.39 km) |
| Merthyr Tudful to Colton (California) | 5,293.62 mi (8,519.26 km) |
