| Merthyr Tudful to Columbia (Illinois) | 4,076.11 mi (6,559.87 km) |
| Merthyr Tudful to Columbia (Maryland) | 3,506.34 mi (5,642.92 km) |
| Merthyr Tudful to Columbia (Missouri) | 4,134.43 mi (6,653.73 km) |
| Merthyr Tudful to Columbia (Pennsylvania) | 3,454.62 mi (5,559.68 km) |
| Merthyr Tudful to Columbia (South Carolina) | 3,911.24 mi (6,294.53 km) |
| Merthyr Tudful to Columbia (Tennessee) | 4,086.55 mi (6,576.67 km) |
| Merthyr Tudful to Columbia Heights (Minnesota) | 3,881.04 mi (6,245.92 km) |
| Merthyr Tudful to Columbine (Colorado) | 4,573.27 mi (7,359.97 km) |
| Merthyr Tudful to Columbus (Georgia) | 4,149.19 mi (6,677.48 km) |
| Merthyr Tudful to Columbus (Indiana) | 3,871.66 mi (6,230.84 km) |
| Merthyr Tudful to Columbus (Mississippi) | 4,244.47 mi (6,830.81 km) |
| Merthyr Tudful to Columbus (Nebraska) | 4,202.69 mi (6,763.58 km) |
| Merthyr Tudful to Columbus (Ohio) | 3,719.31 mi (5,985.65 km) |
| Merthyr Tudful to Commack (New York) | 3,287.89 mi (5,291.35 km) |
| Merthyr Tudful to Commerce (California) | 5,324.27 mi (8,568.59 km) |
