| Potomac to Mombris | 4,079.64 mi (6,565.54 km) |
| Potomac to Monchengladbach | 3,938.32 mi (6,338.11 km) |
| Potomac to Monschau | 3,948.57 mi (6,354.61 km) |
| Potomac to Montabaur | 4,015.11 mi (6,461.70 km) |
| Potomac to Moosburg | 4,240.59 mi (6,824.57 km) |
| Potomac to Morbach | 4,004.07 mi (6,443.93 km) |
| Potomac to Morfelden-Walldorf | 4,058.15 mi (6,530.96 km) |
| Potomac to Morlenbach | 4,076.12 mi (6,559.88 km) |
| Potomac to Morsbach | 3,998.64 mi (6,435.18 km) |
| Potomac to Mosbach | 4,100.06 mi (6,598.41 km) |
| Potomac to Mosigkau | 4,146.84 mi (6,673.69 km) |
| Potomac to Mossingen | 4,124.94 mi (6,638.44 km) |
| Potomac to Much | 3,984.62 mi (6,412.62 km) |
| Potomac to Mucheln | 4,146.44 mi (6,673.04 km) |
| Potomac to Muhlacker | 4,099.58 mi (6,597.64 km) |
