| Swinton to Mangualde | 926.95 mi (1,491.78 km) |
| Swinton to Marco de Canavezes | 893.45 mi (1,437.87 km) |
| Swinton to Marinha Grande | 999.94 mi (1,609.24 km) |
| Swinton to Massama | 1,070.94 mi (1,723.52 km) |
| Swinton to Matosinhos | 901.47 mi (1,450.78 km) |
| Swinton to Mealhada | 950.91 mi (1,530.34 km) |
| Swinton to Melgaco | 833.25 mi (1,340.99 km) |
| Swinton to Melres | 904.75 mi (1,456.06 km) |
| Swinton to Mira | 951.64 mi (1,531.52 km) |
| Swinton to Miranda do Corvo | 968.20 mi (1,558.16 km) |
| Swinton to Mirandela | 860.64 mi (1,385.07 km) |
| Swinton to Mogadouro | 865.56 mi (1,392.99 km) |
| Swinton to Moimenta da Beira | 899.91 mi (1,448.26 km) |
| Swinton to Moita | 1,073.93 mi (1,728.33 km) |
| Swinton to Moncao | 839.38 mi (1,350.85 km) |
