| Merthyr Tudful to Livermore (California) | 5,229.85 mi (8,416.63 km) |
| Merthyr Tudful to Livingston (California) | 5,214.83 mi (8,392.46 km) |
| Merthyr Tudful to Livonia (Michigan) | 3,626.70 mi (5,836.61 km) |
| Merthyr Tudful to Lochearn (Maryland) | 3,494.62 mi (5,624.05 km) |
| Merthyr Tudful to Lockhart (Florida) | 4,197.15 mi (6,754.66 km) |
| Merthyr Tudful to Lockhart (Texas) | 4,799.16 mi (7,723.51 km) |
| Merthyr Tudful to Lockport (Illinois) | 3,844.24 mi (6,186.70 km) |
| Merthyr Tudful to Lockport (New York) | 3,408.41 mi (5,485.31 km) |
| Merthyr Tudful to Lodi (California) | 5,190.65 mi (8,353.55 km) |
| Merthyr Tudful to Lodi (New Jersey) | 3,319.22 mi (5,341.76 km) |
| Merthyr Tudful to Logan (Utah) | 4,690.49 mi (7,548.61 km) |
| Merthyr Tudful to Logansport (Indiana) | 3,817.75 mi (6,144.08 km) |
| Merthyr Tudful to Loganville (Georgia) | 4,044.46 mi (6,508.94 km) |
| Merthyr Tudful to Loma Linda (California) | 5,291.60 mi (8,516.00 km) |
| Merthyr Tudful to Lombard (Illinois) | 3,830.71 mi (6,164.93 km) |
