| Harpenden to Miedzychod | 688.07 mi (1,107.34 km) |
| Harpenden to Miedzyrzec Podlaski | 982.23 mi (1,580.75 km) |
| Harpenden to Miedzyrzecz | 676.10 mi (1,088.07 km) |
| Harpenden to Mielec | 948.57 mi (1,526.58 km) |
| Harpenden to Mikolow | 842.48 mi (1,355.84 km) |
| Harpenden to Milanowek | 892.44 mi (1,436.24 km) |
| Harpenden to Milicz | 754.03 mi (1,213.49 km) |
| Harpenden to Minsk Mazowiecki | 929.18 mi (1,495.36 km) |
| Harpenden to Mlawa | 873.64 mi (1,405.98 km) |
| Harpenden to Mogilno | 774.51 mi (1,246.46 km) |
| Harpenden to Monki | 973.88 mi (1,567.31 km) |
| Harpenden to Morag | 855.37 mi (1,376.59 km) |
| Harpenden to Mosina | 729.90 mi (1,174.66 km) |
| Harpenden to Mragowo | 910.97 mi (1,466.06 km) |
| Harpenden to Murowana Goslina | 735.70 mi (1,184.00 km) |
