| Letterkenny to Leopoldsburg | 599.62 mi (964.99 km) |
| Letterkenny to Lessines | 563.21 mi (906.40 km) |
| Letterkenny to Leuven | 587.83 mi (946.03 km) |
| Letterkenny to Lichtervelde | 525.66 mi (845.97 km) |
| Letterkenny to Liedekerke | 566.17 mi (911.16 km) |
| Letterkenny to Liege | 628.86 mi (1,012.06 km) |
| Letterkenny to Lierre | 573.60 mi (923.13 km) |
| Letterkenny to Lille | 579.80 mi (933.09 km) |
| Letterkenny to Lint | 571.16 mi (919.19 km) |
| Letterkenny to Lochristi | 548.14 mi (882.14 km) |
| Letterkenny to Lokeren | 553.57 mi (890.88 km) |
| Letterkenny to Lommel | 597.75 mi (961.98 km) |
| Letterkenny to Londerzeel | 568.86 mi (915.49 km) |
| Letterkenny to Louvain-la-Neuve | 589.01 mi (947.92 km) |
| Letterkenny to Lovendegem | 539.72 mi (868.60 km) |
