| Merthyr Tudful to Laindon | 163.11 mi (262.50 km) |
| Merthyr Tudful to Lambeth | 140.89 mi (226.74 km) |
| Merthyr Tudful to Lanark | 272.16 mi (437.99 km) |
| Merthyr Tudful to Lancaster | 161.12 mi (259.30 km) |
| Merthyr Tudful to Lancing | 146.39 mi (235.59 km) |
| Merthyr Tudful to Larbert | 296.27 mi (476.81 km) |
| Merthyr Tudful to Largs | 286.50 mi (461.08 km) |
| Merthyr Tudful to Larkhall | 277.02 mi (445.82 km) |
| Merthyr Tudful to Launceston | 87.45 mi (140.74 km) |
| Merthyr Tudful to Leagrave | 124.84 mi (200.91 km) |
| Merthyr Tudful to Leatherhead | 134.68 mi (216.75 km) |
| Merthyr Tudful to Ledbury | 45.40 mi (73.06 km) |
| Merthyr Tudful to Leeds | 161.38 mi (259.71 km) |
| Merthyr Tudful to Leek | 110.23 mi (177.40 km) |
| Merthyr Tudful to Leicester | 113.33 mi (182.38 km) |
