| Southwick to Mangualde | 793.65 mi (1,277.26 km) |
| Southwick to Marco de Canavezes | 766.40 mi (1,233.40 km) |
| Southwick to Marinha Grande | 873.41 mi (1,405.62 km) |
| Southwick to Massama | 943.25 mi (1,518.02 km) |
| Southwick to Matosinhos | 779.65 mi (1,254.73 km) |
| Southwick to Mealhada | 822.89 mi (1,324.31 km) |
| Southwick to Melgaco | 712.39 mi (1,146.48 km) |
| Southwick to Melres | 779.49 mi (1,254.47 km) |
| Southwick to Mira | 826.41 mi (1,329.97 km) |
| Southwick to Miranda do Corvo | 837.91 mi (1,348.49 km) |
| Southwick to Mirandela | 725.73 mi (1,167.95 km) |
| Southwick to Mogadouro | 725.58 mi (1,167.71 km) |
| Southwick to Moimenta da Beira | 766.86 mi (1,234.14 km) |
| Southwick to Moita | 943.47 mi (1,518.37 km) |
| Southwick to Moncao | 720.42 mi (1,159.40 km) |
