| Harpenden to Maastricht | 268.90 mi (432.76 km) |
| Harpenden to Made | 220.26 mi (354.47 km) |
| Harpenden to Margraten | 275.14 mi (442.79 km) |
| Harpenden to Marum | 293.20 mi (471.87 km) |
| Harpenden to Medemblik | 235.47 mi (378.96 km) |
| Harpenden to Meerssen | 271.07 mi (436.25 km) |
| Harpenden to Meppel | 282.94 mi (455.35 km) |
| Harpenden to Middelburg | 171.51 mi (276.02 km) |
| Harpenden to Middelharnis | 193.33 mi (311.13 km) |
| Harpenden to Mierlo | 257.37 mi (414.20 km) |
| Harpenden to Moerdijk | 212.19 mi (341.49 km) |
| Harpenden to Monnickendam | 232.67 mi (374.45 km) |
| Harpenden to Montfoort | 226.41 mi (364.37 km) |
| Harpenden to Naaldwijk | 194.62 mi (313.21 km) |
| Harpenden to Naarden | 236.54 mi (380.67 km) |
