| Potomac to Mankato (Minnesota) | 935.41 mi (1,505.39 km) |
| Potomac to Manor (Texas) | 1,296.53 mi (2,086.57 km) |
| Potomac to Manorville (New York) | 265.71 mi (427.62 km) |
| Potomac to Mansfield (Ohio) | 307.47 mi (494.83 km) |
| Potomac to Mansfield (Texas) | 1,199.11 mi (1,929.78 km) |
| Potomac to Manteca (California) | 2,362.10 mi (3,801.43 km) |
| Potomac to Manville (New Jersey) | 174.00 mi (280.02 km) |
| Potomac to Maple Grove (Minnesota) | 932.40 mi (1,500.55 km) |
| Potomac to Maple Heights (Ohio) | 283.69 mi (456.55 km) |
| Potomac to Maple Valley (Washington) | 2,297.42 mi (3,697.34 km) |
| Potomac to Mapleton (Utah) | 1,821.33 mi (2,931.14 km) |
| Potomac to Maplewood (Minnesota) | 909.35 mi (1,463.46 km) |
| Potomac to Marana (Arizona) | 1,946.38 mi (3,132.39 km) |
| Potomac to Marco Island (Florida) | 940.83 mi (1,514.12 km) |
| Potomac to Margate (Florida) | 899.29 mi (1,447.27 km) |
