| Niel to Marco de Canavezes | 907.49 mi (1,460.47 km) |
| Niel to Marinha Grande | 1,011.95 mi (1,628.58 km) |
| Niel to Massama | 1,079.06 mi (1,736.58 km) |
| Niel to Matosinhos | 924.78 mi (1,488.29 km) |
| Niel to Mealhada | 961.45 mi (1,547.30 km) |
| Niel to Melgaco | 860.40 mi (1,384.68 km) |
| Niel to Melres | 921.73 mi (1,483.39 km) |
| Niel to Mira | 967.32 mi (1,556.75 km) |
| Niel to Miranda do Corvo | 974.00 mi (1,567.50 km) |
| Niel to Mirandela | 861.04 mi (1,385.71 km) |
| Niel to Mogadouro | 855.91 mi (1,377.45 km) |
| Niel to Moimenta da Beira | 902.52 mi (1,452.46 km) |
| Niel to Moita | 1,076.72 mi (1,732.81 km) |
| Niel to Moncao | 869.68 mi (1,399.61 km) |
| Niel to Montalegre | 861.06 mi (1,385.75 km) |
