| Potomac to Los Llanos de Aridane | 3,417.24 mi (5,499.51 km) |
| Potomac to Los Palacios y Villafranca | 3,773.35 mi (6,072.62 km) |
| Potomac to Luanco | 3,603.18 mi (5,798.76 km) |
| Potomac to Lucena | 3,837.63 mi (6,176.06 km) |
| Potomac to Lugo | 3,535.20 mi (5,689.35 km) |
| Potomac to Lumbreras | 3,964.13 mi (6,379.65 km) |
| Potomac to Madrid | 3,787.24 mi (6,094.97 km) |
| Potomac to Madridejos | 3,822.78 mi (6,152.17 km) |
| Potomac to Mahon | 4,180.90 mi (6,728.51 km) |
| Potomac to Mairena del Alcor | 3,776.76 mi (6,078.11 km) |
| Potomac to Mairena del Aljarafe | 3,761.21 mi (6,053.08 km) |
| Potomac to Majadahonda | 3,777.55 mi (6,079.38 km) |
| Potomac to Malaga | 3,861.44 mi (6,214.39 km) |
| Potomac to Malgrat de Mar | 4,054.59 mi (6,525.23 km) |
| Potomac to Manacor | 4,141.65 mi (6,665.34 km) |
