| Merthyr Tudful to Leopoldsburg | 374.21 mi (602.23 km) |
| Merthyr Tudful to Lessines | 319.82 mi (514.69 km) |
| Merthyr Tudful to Leuven | 353.70 mi (569.22 km) |
| Merthyr Tudful to Lichtervelde | 284.90 mi (458.50 km) |
| Merthyr Tudful to Liedekerke | 327.78 mi (527.51 km) |
| Merthyr Tudful to Liege | 394.65 mi (635.13 km) |
| Merthyr Tudful to Lierre | 344.59 mi (554.56 km) |
| Merthyr Tudful to Lille | 354.83 mi (571.05 km) |
| Merthyr Tudful to Lint | 341.23 mi (549.16 km) |
| Merthyr Tudful to Lochristi | 313.73 mi (504.90 km) |
| Merthyr Tudful to Lokeren | 320.12 mi (515.19 km) |
| Merthyr Tudful to Lommel | 375.50 mi (604.31 km) |
| Merthyr Tudful to Londerzeel | 334.97 mi (539.08 km) |
| Merthyr Tudful to Louvain-la-Neuve | 348.86 mi (561.44 km) |
| Merthyr Tudful to Lovendegem | 303.80 mi (488.91 km) |
