| Merthyr Tudful to Lynn (Massachusetts) | 3,124.38 mi (5,028.20 km) |
| Merthyr Tudful to Lynn Haven (Florida) | 4,292.85 mi (6,908.67 km) |
| Merthyr Tudful to Lynnwood (Washington) | 4,671.38 mi (7,517.86 km) |
| Merthyr Tudful to Lynwood (California) | 5,330.00 mi (8,577.80 km) |
| Merthyr Tudful to Lyons (Illinois) | 3,825.98 mi (6,157.32 km) |
| Merthyr Tudful to Mableton (Georgia) | 4,073.02 mi (6,554.89 km) |
| Merthyr Tudful to Macedonia (Ohio) | 3,600.46 mi (5,794.38 km) |
| Merthyr Tudful to Machesney Park (Illinois) | 3,846.88 mi (6,190.96 km) |
| Merthyr Tudful to Mack (Ohio) | 3,825.20 mi (6,156.07 km) |
| Merthyr Tudful to Macomb (Illinois) | 3,998.45 mi (6,434.89 km) |
| Merthyr Tudful to Macon (Georgia) | 4,086.09 mi (6,575.93 km) |
| Merthyr Tudful to Madera (California) | 5,218.64 mi (8,398.59 km) |
| Merthyr Tudful to Madison (Alabama) | 4,119.09 mi (6,629.03 km) |
| Merthyr Tudful to Madison (Indiana) | 3,871.94 mi (6,231.28 km) |
| Merthyr Tudful to Madison (Mississippi) | 4,365.25 mi (7,025.19 km) |
