| Potomac to Menen | 3,815.36 mi (6,140.23 km) |
| Potomac to Merchtem | 3,856.14 mi (6,205.85 km) |
| Potomac to Merelbeke | 3,835.74 mi (6,173.03 km) |
| Potomac to Merksem | 3,857.46 mi (6,207.99 km) |
| Potomac to Merksplas | 3,871.34 mi (6,230.32 km) |
| Potomac to Mettet | 3,890.15 mi (6,260.60 km) |
| Potomac to Meulebeke | 3,818.23 mi (6,144.85 km) |
| Potomac to Middelkerke | 3,793.46 mi (6,104.99 km) |
| Potomac to Mol | 3,886.11 mi (6,254.09 km) |
| Potomac to Mons | 3,857.90 mi (6,208.69 km) |
| Potomac to Montignies-le-Tilleul | 3,877.31 mi (6,239.93 km) |
| Potomac to Moorslede | 3,810.60 mi (6,132.57 km) |
| Potomac to Moortebeek | 3,863.27 mi (6,217.33 km) |
| Potomac to Morlanwelz-Mariemont | 3,869.46 mi (6,227.29 km) |
| Potomac to Mortsel | 3,860.43 mi (6,212.76 km) |
