| Harpenden to Montevarchi | 795.35 mi (1,279.99 km) |
| Harpenden to Monticello Conte Otto | 691.86 mi (1,113.44 km) |
| Harpenden to Montichiari | 659.43 mi (1,061.25 km) |
| Harpenden to Montignoso | 725.04 mi (1,166.85 km) |
| Harpenden to Montopoli in Val d'Arno | 762.05 mi (1,226.40 km) |
| Harpenden to Monza | 614.02 mi (988.17 km) |
| Harpenden to Morbegno | 596.23 mi (959.55 km) |
| Harpenden to Mori | 658.88 mi (1,060.36 km) |
| Harpenden to Morlupo | 899.65 mi (1,447.85 km) |
| Harpenden to Morrovalle | 873.13 mi (1,405.17 km) |
| Harpenden to Mortara | 614.99 mi (989.74 km) |
| Harpenden to Mosciano Sant'Angelo | 912.29 mi (1,468.19 km) |
| Harpenden to Motta di Livenza | 720.81 mi (1,160.04 km) |
| Harpenden to Motta Sant'Anastasia | 1,237.79 mi (1,992.03 km) |
| Harpenden to Mottola | 1,129.44 mi (1,817.66 km) |
