| Karlovo to Leopoldsburg | 1,088.14 mi (1,751.19 km) |
| Karlovo to Lessines | 1,134.28 mi (1,825.45 km) |
| Karlovo to Leuven | 1,103.62 mi (1,776.10 km) |
| Karlovo to Lichtervelde | 1,170.66 mi (1,883.99 km) |
| Karlovo to Liedekerke | 1,127.98 mi (1,815.31 km) |
| Karlovo to Liege | 1,062.02 mi (1,709.15 km) |
| Karlovo to Lierre | 1,115.83 mi (1,795.75 km) |
| Karlovo to Lille | 1,108.12 mi (1,783.35 km) |
| Karlovo to Lint | 1,118.68 mi (1,800.34 km) |
| Karlovo to Lochristi | 1,144.17 mi (1,841.36 km) |
| Karlovo to Lokeren | 1,138.16 mi (1,831.69 km) |
| Karlovo to Lommel | 1,089.17 mi (1,752.84 km) |
| Karlovo to Londerzeel | 1,122.80 mi (1,806.97 km) |
| Karlovo to Louvain-la-Neuve | 1,105.90 mi (1,779.78 km) |
| Karlovo to Lovendegem | 1,153.53 mi (1,856.43 km) |
