| Merthyr Tudful to Los Alamos (New Mexico) | 4,810.01 mi (7,740.97 km) |
| Merthyr Tudful to Los Altos (California) | 5,258.38 mi (8,462.55 km) |
| Merthyr Tudful to Los Angeles (California) | 5,326.03 mi (8,571.42 km) |
| Merthyr Tudful to Los Banos (California) | 5,236.91 mi (8,427.99 km) |
| Merthyr Tudful to Los Gatos (California) | 5,261.97 mi (8,468.32 km) |
| Merthyr Tudful to Los Lunas (New Mexico) | 4,885.20 mi (7,861.97 km) |
| Merthyr Tudful to Los Osos (California) | 5,336.52 mi (8,588.30 km) |
| Merthyr Tudful to Loudoun Valley Estates (Virginia) | 3,542.80 mi (5,701.59 km) |
| Merthyr Tudful to Louisville (Colorado) | 4,556.09 mi (7,332.32 km) |
| Merthyr Tudful to Louisville (Kentucky) | 3,909.58 mi (6,291.87 km) |
| Merthyr Tudful to Lovejoy (Georgia) | 4,080.79 mi (6,567.39 km) |
| Merthyr Tudful to Loveland (Colorado) | 4,530.23 mi (7,290.69 km) |
| Merthyr Tudful to Loveland (Ohio) | 3,803.54 mi (6,121.21 km) |
| Merthyr Tudful to Loves Park (Illinois) | 3,847.16 mi (6,191.40 km) |
| Merthyr Tudful to Lovington (New Mexico) | 4,858.26 mi (7,818.62 km) |
