| Merthyr Tudful to South Fulton (Georgia) | 4,082.61 mi (6,570.33 km) |
| Merthyr Tudful to South Gate (California) | 5,328.53 mi (8,575.44 km) |
| Merthyr Tudful to South Hill (Washington) | 4,710.60 mi (7,580.97 km) |
| Merthyr Tudful to South Holland (Illinois) | 3,827.41 mi (6,159.63 km) |
| Merthyr Tudful to South Houston (Texas) | 4,712.81 mi (7,584.53 km) |
| Merthyr Tudful to South Huntington (New York) | 3,293.27 mi (5,300.00 km) |
| Merthyr Tudful to South Jordan (Utah) | 4,758.33 mi (7,657.80 km) |
| Merthyr Tudful to South Lake Tahoe (California) | 5,103.84 mi (8,213.83 km) |
| Merthyr Tudful to South Laurel (Maryland) | 3,512.02 mi (5,652.04 km) |
| Merthyr Tudful to South Lyon (Michigan) | 3,634.80 mi (5,849.65 km) |
| Merthyr Tudful to South Miami (Florida) | 4,295.26 mi (6,912.55 km) |
| Merthyr Tudful to South Miami Heights (Florida) | 4,305.15 mi (6,928.48 km) |
| Merthyr Tudful to South Milwaukee (Wisconsin) | 3,777.56 mi (6,079.40 km) |
| Merthyr Tudful to South Ogden (Utah) | 4,724.65 mi (7,603.58 km) |
| Merthyr Tudful to South Pasadena (California) | 5,318.02 mi (8,558.53 km) |
