| Potomac to Mancha Real | 3,868.83 mi (6,226.29 km) |
| Potomac to Manilva | 3,830.41 mi (6,164.45 km) |
| Potomac to Manises | 3,970.59 mi (6,390.05 km) |
| Potomac to Manlleu | 4,022.56 mi (6,473.68 km) |
| Potomac to Manresa | 4,009.83 mi (6,453.19 km) |
| Potomac to Manzanares | 3,844.34 mi (6,186.87 km) |
| Potomac to Manzanares el Real | 3,770.91 mi (6,068.69 km) |
| Potomac to Maracena | 3,885.66 mi (6,253.36 km) |
| Potomac to Marbella | 3,844.61 mi (6,187.31 km) |
| Potomac to Marchena | 3,793.45 mi (6,104.97 km) |
| Potomac to Marin | 3,495.81 mi (5,625.96 km) |
| Potomac to Marratxi | 4,117.82 mi (6,626.99 km) |
| Potomac to Martorell | 4,022.17 mi (6,473.06 km) |
| Potomac to Martos | 3,853.54 mi (6,201.67 km) |
| Potomac to Masamagrell | 3,973.67 mi (6,395.00 km) |
