| Harpenden to Moncalieri | 597.36 mi (961.36 km) |
| Harpenden to Mondolfo | 834.73 mi (1,343.37 km) |
| Harpenden to Mondovi | 636.28 mi (1,023.99 km) |
| Harpenden to Monesiglio | 639.74 mi (1,029.57 km) |
| Harpenden to Monfalcone | 754.44 mi (1,214.15 km) |
| Harpenden to Monopoli | 1,122.32 mi (1,806.19 km) |
| Harpenden to Monreale | 1,155.89 mi (1,860.22 km) |
| Harpenden to Monselice | 715.11 mi (1,150.85 km) |
| Harpenden to Monserrato | 980.70 mi (1,578.28 km) |
| Harpenden to Monsummano | 753.38 mi (1,212.45 km) |
| Harpenden to Montagnana | 705.18 mi (1,134.87 km) |
| Harpenden to Montale | 756.18 mi (1,216.96 km) |
| Harpenden to Montalto di Castro | 860.40 mi (1,384.67 km) |
| Harpenden to Montalto Uffugo | 1,166.09 mi (1,876.64 km) |
| Harpenden to Monte Compatri | 925.32 mi (1,489.15 km) |
