| New Silksworth to Mangualde | 1,028.11 mi (1,654.59 km) |
| New Silksworth to Marco de Canavezes | 994.77 mi (1,600.92 km) |
| New Silksworth to Marinha Grande | 1,101.28 mi (1,772.34 km) |
| New Silksworth to Massama | 1,172.29 mi (1,886.62 km) |
| New Silksworth to Matosinhos | 1,002.83 mi (1,613.90 km) |
| New Silksworth to Mealhada | 1,052.23 mi (1,693.39 km) |
| New Silksworth to Melgaco | 934.62 mi (1,504.12 km) |
| New Silksworth to Melres | 1,006.10 mi (1,619.16 km) |
| New Silksworth to Mira | 1,052.99 mi (1,694.63 km) |
| New Silksworth to Miranda do Corvo | 1,069.47 mi (1,721.15 km) |
| New Silksworth to Mirandela | 961.70 mi (1,547.70 km) |
| New Silksworth to Mogadouro | 966.35 mi (1,555.19 km) |
| New Silksworth to Moimenta da Beira | 1,001.07 mi (1,611.06 km) |
| New Silksworth to Moita | 1,175.24 mi (1,891.36 km) |
| New Silksworth to Moncao | 940.74 mi (1,513.97 km) |
