| Gretna to Menen | 4,777.20 mi (7,688.15 km) |
| Gretna to Merchtem | 4,817.44 mi (7,752.92 km) |
| Gretna to Merelbeke | 4,797.16 mi (7,720.28 km) |
| Gretna to Merksem | 4,818.34 mi (7,754.37 km) |
| Gretna to Merksplas | 4,831.90 mi (7,776.19 km) |
| Gretna to Mettet | 4,852.07 mi (7,808.65 km) |
| Gretna to Meulebeke | 4,779.85 mi (7,692.42 km) |
| Gretna to Middelkerke | 4,754.93 mi (7,652.33 km) |
| Gretna to Mol | 4,846.83 mi (7,800.22 km) |
| Gretna to Mons | 4,819.88 mi (7,756.84 km) |
| Gretna to Montignies-le-Tilleul | 4,839.24 mi (7,788.00 km) |
| Gretna to Moorslede | 4,772.34 mi (7,680.34 km) |
| Gretna to Moortebeek | 4,824.68 mi (7,764.57 km) |
| Gretna to Morlanwelz-Mariemont | 4,831.36 mi (7,775.31 km) |
| Gretna to Mortsel | 4,821.40 mi (7,759.29 km) |
