| Potomac to Leigh | 3,529.75 mi (5,680.58 km) |
| Potomac to Leigh-on-Sea | 3,697.21 mi (5,950.08 km) |
| Potomac to Leighton Buzzard | 3,635.63 mi (5,850.97 km) |
| Potomac to Leith | 3,461.77 mi (5,571.18 km) |
| Potomac to Lemington | 3,533.69 mi (5,686.93 km) |
| Potomac to Leominster | 3,545.01 mi (5,705.14 km) |
| Potomac to Lerwick | 3,472.94 mi (5,589.16 km) |
| Potomac to Letchworth | 3,651.77 mi (5,876.96 km) |
| Potomac to Leven | 3,464.99 mi (5,576.36 km) |
| Potomac to Lewes | 3,686.11 mi (5,932.22 km) |
| Potomac to Leyland | 3,518.97 mi (5,663.23 km) |
| Potomac to Leyton | 3,669.42 mi (5,905.37 km) |
| Potomac to Lichfield | 3,572.77 mi (5,749.82 km) |
| Potomac to Lincoln | 3,613.16 mi (5,814.82 km) |
| Potomac to Linlithgow | 3,445.19 mi (5,544.50 km) |
