| Potomac to Lastra a Signa | 4,361.05 mi (7,018.43 km) |
| Potomac to Laterza | 4,722.79 mi (7,600.60 km) |
| Potomac to Latiano | 4,766.63 mi (7,671.15 km) |
| Potomac to Latina | 4,520.52 mi (7,275.08 km) |
| Potomac to Latisana | 4,378.41 mi (7,046.37 km) |
| Potomac to Lauria Inferiore | 4,702.43 mi (7,567.84 km) |
| Potomac to Lavagna | 4,265.87 mi (6,865.25 km) |
| Potomac to Lavello | 4,663.29 mi (7,504.83 km) |
| Potomac to Laveno-Mombello | 4,183.92 mi (6,733.37 km) |
| Potomac to Lavis | 4,282.67 mi (6,892.30 km) |
| Potomac to Lecce | 4,793.32 mi (7,714.11 km) |
| Potomac to Lecco | 4,219.09 mi (6,789.97 km) |
| Potomac to Legnago | 4,322.09 mi (6,955.73 km) |
| Potomac to Legnano | 4,207.17 mi (6,770.78 km) |
| Potomac to Legnaro | 4,344.66 mi (6,992.06 km) |
