| Merthyr Tudful to Lastra a Signa | 866.78 mi (1,394.95 km) |
| Merthyr Tudful to Laterza | 1,226.09 mi (1,973.20 km) |
| Merthyr Tudful to Latiano | 1,264.91 mi (2,035.67 km) |
| Merthyr Tudful to Latina | 1,045.13 mi (1,681.97 km) |
| Merthyr Tudful to Latisana | 853.94 mi (1,374.29 km) |
| Merthyr Tudful to Lauria Inferiore | 1,220.46 mi (1,964.15 km) |
| Merthyr Tudful to Lavagna | 777.94 mi (1,251.97 km) |
| Merthyr Tudful to Lavello | 1,168.94 mi (1,881.23 km) |
| Merthyr Tudful to Laveno-Mombello | 677.11 mi (1,089.70 km) |
| Merthyr Tudful to Lavis | 761.56 mi (1,225.61 km) |
| Merthyr Tudful to Lecce | 1,290.62 mi (2,077.06 km) |
| Merthyr Tudful to Lecco | 708.35 mi (1,139.98 km) |
| Merthyr Tudful to Legnago | 808.64 mi (1,301.39 km) |
| Merthyr Tudful to Legnano | 702.98 mi (1,131.34 km) |
| Merthyr Tudful to Legnaro | 826.81 mi (1,330.62 km) |
