| Potomac to Leopoldsburg | 3,893.43 mi (6,265.87 km) |
| Potomac to Lessines | 3,846.31 mi (6,190.04 km) |
| Potomac to Leuven | 3,877.14 mi (6,239.66 km) |
| Potomac to Lichtervelde | 3,809.92 mi (6,131.48 km) |
| Potomac to Liedekerke | 3,852.63 mi (6,200.20 km) |
| Potomac to Liege | 3,918.74 mi (6,306.60 km) |
| Potomac to Lierre | 3,865.31 mi (6,220.61 km) |
| Potomac to Lille | 3,873.44 mi (6,233.71 km) |
| Potomac to Lint | 3,862.38 mi (6,215.90 km) |
| Potomac to Lochristi | 3,836.59 mi (6,174.39 km) |
| Potomac to Lokeren | 3,842.64 mi (6,184.14 km) |
| Potomac to Lommel | 3,892.82 mi (6,264.89 km) |
| Potomac to Londerzeel | 3,857.98 mi (6,208.82 km) |
| Potomac to Louvain-la-Neuve | 3,874.68 mi (6,235.69 km) |
| Potomac to Lovendegem | 3,827.16 mi (6,159.22 km) |
