| Potomac to La Union | 4,007.85 mi (6,450.01 km) |
| Potomac to La Victoria de Acentejo | 3,500.64 mi (5,633.73 km) |
| Potomac to Laguna de Duero | 3,706.47 mi (5,964.99 km) |
| Potomac to Lalin | 3,517.32 mi (5,660.58 km) |
| Potomac to Lardero | 3,789.78 mi (6,099.07 km) |
| Potomac to Laredo | 3,718.93 mi (5,985.03 km) |
| Potomac to Las Cabezas de San Juan | 3,777.92 mi (6,079.98 km) |
| Potomac to Las Palmas | 3,566.12 mi (5,739.12 km) |
| Potomac to Las Rozas de Madrid | 3,776.97 mi (6,078.44 km) |
| Potomac to Las Torres de Cotillas | 3,977.20 mi (6,400.69 km) |
| Potomac to Lebrija | 3,772.94 mi (6,071.96 km) |
| Potomac to Leganes | 3,786.83 mi (6,094.31 km) |
| Potomac to Leon | 3,639.01 mi (5,856.41 km) |
| Potomac to Lepe | 3,706.98 mi (5,965.81 km) |
| Potomac to Linares | 3,858.86 mi (6,210.24 km) |
