| Potomac to Mendota (California) | 2,337.92 mi (3,762.51 km) |
| Potomac to Mendota Heights (Minnesota) | 912.06 mi (1,467.82 km) |
| Potomac to Menifee (California) | 2,237.31 mi (3,600.60 km) |
| Potomac to Menlo Park (California) | 2,417.81 mi (3,891.09 km) |
| Potomac to Menomonee Falls (Wisconsin) | 636.13 mi (1,023.76 km) |
| Potomac to Menomonie (Wisconsin) | 856.35 mi (1,378.16 km) |
| Potomac to Mentor (Ohio) | 285.82 mi (459.98 km) |
| Potomac to Mequon (Wisconsin) | 632.09 mi (1,017.25 km) |
| Potomac to Merced (California) | 2,332.16 mi (3,753.25 km) |
| Potomac to Mercedes (Texas) | 1,492.05 mi (2,401.23 km) |
| Potomac to Mercer Island (Washington) | 2,306.02 mi (3,711.19 km) |
| Potomac to Mercerville (New Jersey) | 157.68 mi (253.76 km) |
| Potomac to Meriden (Connecticut) | 290.06 mi (466.81 km) |
| Potomac to Meridian (Idaho) | 2,039.88 mi (3,282.88 km) |
| Potomac to Meridian (Mississippi) | 790.05 mi (1,271.46 km) |
