| Harpenden to Menen | 165.82 mi (266.86 km) |
| Harpenden to Merchtem | 206.22 mi (331.88 km) |
| Harpenden to Merelbeke | 185.58 mi (298.66 km) |
| Harpenden to Merksem | 209.80 mi (337.64 km) |
| Harpenden to Merksplas | 226.13 mi (363.92 km) |
| Harpenden to Mettet | 240.80 mi (387.54 km) |
| Harpenden to Meulebeke | 167.97 mi (270.33 km) |
| Harpenden to Middelkerke | 143.23 mi (230.51 km) |
| Harpenden to Mol | 239.22 mi (384.99 km) |
| Harpenden to Mons | 209.06 mi (336.44 km) |
| Harpenden to Montignies-le-Tilleul | 228.06 mi (367.03 km) |
| Harpenden to Moorslede | 160.66 mi (258.55 km) |
| Harpenden to Moortebeek | 213.09 mi (342.94 km) |
| Harpenden to Morlanwelz-Mariemont | 220.08 mi (354.18 km) |
| Harpenden to Mortsel | 212.09 mi (341.33 km) |
