| Den Helder to Marco de Canavezes | 1,010.53 mi (1,626.29 km) |
| Den Helder to Marinha Grande | 1,116.48 mi (1,796.80 km) |
| Den Helder to Massama | 1,184.97 mi (1,907.02 km) |
| Den Helder to Matosinhos | 1,025.98 mi (1,651.15 km) |
| Den Helder to Mealhada | 1,065.81 mi (1,715.26 km) |
| Den Helder to Melgaco | 959.94 mi (1,544.87 km) |
| Den Helder to Melres | 1,024.29 mi (1,648.44 km) |
| Den Helder to Mira | 1,070.64 mi (1,723.03 km) |
| Den Helder to Miranda do Corvo | 1,079.48 mi (1,737.25 km) |
| Den Helder to Mirandela | 966.42 mi (1,555.30 km) |
| Den Helder to Mogadouro | 963.27 mi (1,550.24 km) |
| Den Helder to Moimenta da Beira | 1,007.92 mi (1,622.09 km) |
| Den Helder to Moita | 1,183.69 mi (1,904.96 km) |
| Den Helder to Moncao | 968.61 mi (1,558.83 km) |
| Den Helder to Montalegre | 963.29 mi (1,550.27 km) |
