| Great Missenden to Mangualde | 837.00 mi (1,347.01 km) |
| Great Missenden to Marco de Canavezes | 807.68 mi (1,299.83 km) |
| Great Missenden to Marinha Grande | 914.92 mi (1,472.43 km) |
| Great Missenden to Massama | 985.33 mi (1,585.74 km) |
| Great Missenden to Matosinhos | 819.34 mi (1,318.60 km) |
| Great Missenden to Mealhada | 864.69 mi (1,391.59 km) |
| Great Missenden to Melgaco | 751.46 mi (1,209.36 km) |
| Great Missenden to Melres | 820.26 mi (1,320.09 km) |
| Great Missenden to Mira | 867.35 mi (1,395.87 km) |
| Great Missenden to Miranda do Corvo | 880.47 mi (1,416.98 km) |
| Great Missenden to Mirandela | 769.32 mi (1,238.09 km) |
| Great Missenden to Mogadouro | 770.76 mi (1,240.42 km) |
| Great Missenden to Moimenta da Beira | 810.02 mi (1,303.61 km) |
| Great Missenden to Moita | 986.41 mi (1,587.47 km) |
| Great Missenden to Moncao | 758.93 mi (1,221.38 km) |
