| Merthyr Tudful to Lindsay (California) | 5,229.92 mi (8,416.75 km) |
| Merthyr Tudful to Linganore (Maryland) | 3,515.06 mi (5,656.95 km) |
| Merthyr Tudful to Lino Lakes (Minnesota) | 3,869.56 mi (6,227.46 km) |
| Merthyr Tudful to Linthicum (Maryland) | 3,497.91 mi (5,629.34 km) |
| Merthyr Tudful to Linton Hall (Virginia) | 3,555.58 mi (5,722.15 km) |
| Merthyr Tudful to Lisle (Illinois) | 3,837.30 mi (6,175.53 km) |
| Merthyr Tudful to Lithia Springs (Georgia) | 4,077.98 mi (6,562.88 km) |
| Merthyr Tudful to Little Canada (Minnesota) | 3,876.28 mi (6,238.27 km) |
| Merthyr Tudful to Little Chute (Wisconsin) | 3,732.91 mi (6,007.54 km) |
| Merthyr Tudful to Little Elm (Texas) | 4,599.21 mi (7,401.71 km) |
| Merthyr Tudful to Little Ferry (New Jersey) | 3,318.84 mi (5,341.15 km) |
| Merthyr Tudful to Little Rock (Arkansas) | 4,342.29 mi (6,988.24 km) |
| Merthyr Tudful to Littleton (Colorado) | 4,571.30 mi (7,356.79 km) |
| Merthyr Tudful to Live Oak (California) | 5,276.71 mi (8,492.04 km) |
| Merthyr Tudful to Live Oak (Texas) | 4,841.97 mi (7,792.40 km) |
