| Watford to Menen | 163.35 mi (262.89 km) |
| Watford to Merchtem | 205.47 mi (330.66 km) |
| Watford to Merelbeke | 184.59 mi (297.07 km) |
| Watford to Merksem | 210.18 mi (338.26 km) |
| Watford to Merksplas | 227.12 mi (365.51 km) |
| Watford to Mettet | 238.29 mi (383.49 km) |
| Watford to Meulebeke | 166.36 mi (267.72 km) |
| Watford to Middelkerke | 142.27 mi (228.96 km) |
| Watford to Mol | 239.68 mi (385.73 km) |
| Watford to Mons | 206.25 mi (331.93 km) |
| Watford to Montignies-le-Tilleul | 225.48 mi (362.87 km) |
| Watford to Moorslede | 158.53 mi (255.13 km) |
| Watford to Moortebeek | 212.02 mi (341.21 km) |
| Watford to Morlanwelz-Mariemont | 217.56 mi (350.12 km) |
| Watford to Mortsel | 212.21 mi (341.51 km) |
