| Harpenden to Malkara | 1,490.09 mi (2,398.07 km) |
| Harpenden to Manavgat | 1,861.05 mi (2,995.06 km) |
| Harpenden to Manisa | 1,614.39 mi (2,598.11 km) |
| Harpenden to Mardin | 2,218.51 mi (3,570.35 km) |
| Harpenden to Marmara Ereglisi | 1,529.23 mi (2,461.05 km) |
| Harpenden to Mazidagi | 2,200.68 mi (3,541.66 km) |
| Harpenden to Mecitozu | 1,851.86 mi (2,980.28 km) |
| Harpenden to Menderes | 1,621.16 mi (2,609.00 km) |
| Harpenden to Menemen | 1,601.94 mi (2,578.07 km) |
| Harpenden to Meram | 1,851.74 mi (2,980.08 km) |
| Harpenden to Mersin | 1,989.12 mi (3,201.18 km) |
| Harpenden to Merzifon | 1,844.27 mi (2,968.07 km) |
| Harpenden to Midyat | 2,240.60 mi (3,605.90 km) |
| Harpenden to Mugla | 1,719.44 mi (2,767.18 km) |
| Harpenden to Mus | 2,188.38 mi (3,521.87 km) |
