| Potomac to Laindon | 3,686.94 mi (5,933.55 km) |
| Potomac to Lambeth | 3,666.96 mi (5,901.40 km) |
| Potomac to Lanark | 3,443.60 mi (5,541.94 km) |
| Potomac to Lancaster | 3,508.41 mi (5,646.25 km) |
| Potomac to Lancing | 3,673.44 mi (5,911.84 km) |
| Potomac to Larbert | 3,436.40 mi (5,530.36 km) |
| Potomac to Largs | 3,400.29 mi (5,472.24 km) |
| Potomac to Larkhall | 3,435.24 mi (5,528.49 km) |
| Potomac to Launceston | 3,509.36 mi (5,647.76 km) |
| Potomac to Leagrave | 3,643.84 mi (5,864.20 km) |
| Potomac to Leatherhead | 3,662.70 mi (5,894.54 km) |
| Potomac to Ledbury | 3,561.65 mi (5,731.92 km) |
| Potomac to Leeds | 3,562.08 mi (5,732.61 km) |
| Potomac to Leek | 3,556.65 mi (5,723.88 km) |
| Potomac to Leicester | 3,601.67 mi (5,796.33 km) |
