| Merthyr Tudful to Liria | 847.75 mi (1,364.32 km) |
| Merthyr Tudful to Llagostera | 745.79 mi (1,200.24 km) |
| Merthyr Tudful to Llanera | 584.00 mi (939.85 km) |
| Merthyr Tudful to Llanes | 578.52 mi (931.03 km) |
| Merthyr Tudful to Lleida | 724.75 mi (1,166.37 km) |
| Merthyr Tudful to Lloret de Mar | 753.02 mi (1,211.87 km) |
| Merthyr Tudful to Lluchmayor | 898.33 mi (1,445.72 km) |
| Merthyr Tudful to Loeches | 784.88 mi (1,263.14 km) |
| Merthyr Tudful to Logrono | 642.53 mi (1,034.05 km) |
| Merthyr Tudful to Loja | 1,007.83 mi (1,621.94 km) |
| Merthyr Tudful to Lora del Rio | 979.27 mi (1,575.98 km) |
| Merthyr Tudful to Lorca | 975.11 mi (1,569.29 km) |
| Merthyr Tudful to Los Alcazares | 975.03 mi (1,569.17 km) |
| Merthyr Tudful to Los Barrios | 1,080.04 mi (1,738.15 km) |
| Merthyr Tudful to Los Corrales de Buelna | 586.87 mi (944.48 km) |
