| Colwyn Bay to Mangualde | 896.81 mi (1,443.28 km) |
| Colwyn Bay to Marco de Canavezes | 861.72 mi (1,386.80 km) |
| Colwyn Bay to Marinha Grande | 967.38 mi (1,556.85 km) |
| Colwyn Bay to Massama | 1,038.36 mi (1,671.08 km) |
| Colwyn Bay to Matosinhos | 868.21 mi (1,397.25 km) |
| Colwyn Bay to Mealhada | 919.07 mi (1,479.10 km) |
| Colwyn Bay to Melgaco | 800.25 mi (1,287.88 km) |
| Colwyn Bay to Melres | 872.43 mi (1,404.04 km) |
| Colwyn Bay to Mira | 919.01 mi (1,479.00 km) |
| Colwyn Bay to Miranda do Corvo | 936.91 mi (1,507.81 km) |
| Colwyn Bay to Mirandela | 831.47 mi (1,338.12 km) |
| Colwyn Bay to Mogadouro | 837.93 mi (1,348.52 km) |
| Colwyn Bay to Moimenta da Beira | 869.88 mi (1,399.94 km) |
| Colwyn Bay to Moita | 1,042.14 mi (1,677.16 km) |
| Colwyn Bay to Moncao | 805.80 mi (1,296.81 km) |
