| South Portland to Menen | 3,336.81 mi (5,370.08 km) |
| South Portland to Merchtem | 3,377.34 mi (5,435.30 km) |
| South Portland to Merelbeke | 3,356.99 mi (5,402.55 km) |
| South Portland to Merksem | 3,378.51 mi (5,437.19 km) |
| South Portland to Merksplas | 3,392.30 mi (5,459.38 km) |
| South Portland to Mettet | 3,411.65 mi (5,490.52 km) |
| South Portland to Meulebeke | 3,339.57 mi (5,374.52 km) |
| South Portland to Middelkerke | 3,314.73 mi (5,334.55 km) |
| South Portland to Mol | 3,407.12 mi (5,483.22 km) |
| South Portland to Mons | 3,379.43 mi (5,438.67 km) |
| South Portland to Montignies-le-Tilleul | 3,398.81 mi (5,469.86 km) |
| South Portland to Moorslede | 3,332.00 mi (5,362.34 km) |
| South Portland to Moortebeek | 3,384.52 mi (5,446.85 km) |
| South Portland to Morlanwelz-Mariemont | 3,390.94 mi (5,457.20 km) |
| South Portland to Mortsel | 3,381.51 mi (5,442.01 km) |
