| Potomac to Maastricht | 3,917.66 mi (6,304.87 km) |
| Potomac to Made | 3,860.44 mi (6,212.78 km) |
| Potomac to Margraten | 3,923.92 mi (6,314.94 km) |
| Potomac to Marum | 3,880.61 mi (6,245.24 km) |
| Potomac to Medemblik | 3,844.55 mi (6,187.20 km) |
| Potomac to Meerssen | 3,919.47 mi (6,307.77 km) |
| Potomac to Meppel | 3,888.92 mi (6,258.62 km) |
| Potomac to Middelburg | 3,817.86 mi (6,144.26 km) |
| Potomac to Middelharnis | 3,833.78 mi (6,169.87 km) |
| Potomac to Mierlo | 3,899.47 mi (6,275.59 km) |
| Potomac to Moerdijk | 3,853.44 mi (6,201.52 km) |
| Potomac to Monnickendam | 3,849.97 mi (6,195.93 km) |
| Potomac to Montfoort | 3,857.20 mi (6,207.56 km) |
| Potomac to Naaldwijk | 3,829.11 mi (6,162.36 km) |
| Potomac to Naarden | 3,859.35 mi (6,211.03 km) |
