| Merthyr Tudful to Largo (Florida) | 4,289.21 mi (6,902.81 km) |
| Merthyr Tudful to Largo (Maryland) | 3,519.35 mi (5,663.85 km) |
| Merthyr Tudful to Larkspur (California) | 5,238.94 mi (8,431.27 km) |
| Merthyr Tudful to Las Cruces (New Mexico) | 5,018.23 mi (8,076.06 km) |
| Merthyr Tudful to Las Vegas (Nevada) | 5,103.38 mi (8,213.09 km) |
| Merthyr Tudful to Las Vegas (New Mexico) | 4,786.80 mi (7,703.61 km) |
| Merthyr Tudful to Latham (New York) | 3,227.28 mi (5,193.81 km) |
| Merthyr Tudful to Lathrop (California) | 5,209.09 mi (8,383.22 km) |
| Merthyr Tudful to Lauderdale Lakes (Florida) | 4,268.06 mi (6,868.79 km) |
| Merthyr Tudful to Lauderhill (Florida) | 4,269.40 mi (6,870.94 km) |
| Merthyr Tudful to Laurel (Florida) | 4,313.87 mi (6,942.51 km) |
| Merthyr Tudful to Laurel (Maryland) | 3,511.16 mi (5,650.67 km) |
| Merthyr Tudful to Laurel (Mississippi) | 4,364.12 mi (7,023.37 km) |
| Merthyr Tudful to Laurel (Virginia) | 3,603.11 mi (5,798.65 km) |
| Merthyr Tudful to Laurinburg (North Carolina) | 3,817.83 mi (6,144.21 km) |
