| Southgate to Mangualde | 844.02 mi (1,358.31 km) |
| Southgate to Marco de Canavezes | 815.72 mi (1,312.77 km) |
| Southgate to Marinha Grande | 922.89 mi (1,485.25 km) |
| Southgate to Massama | 993.04 mi (1,598.15 km) |
| Southgate to Matosinhos | 828.15 mi (1,332.77 km) |
| Southgate to Mealhada | 872.50 mi (1,404.15 km) |
| Southgate to Melgaco | 760.52 mi (1,223.93 km) |
| Southgate to Melres | 828.55 mi (1,333.43 km) |
| Southgate to Mira | 875.58 mi (1,409.11 km) |
| Southgate to Miranda do Corvo | 887.91 mi (1,428.95 km) |
| Southgate to Mirandela | 776.18 mi (1,249.14 km) |
| Southgate to Mogadouro | 776.78 mi (1,250.11 km) |
| Southgate to Moimenta da Beira | 817.12 mi (1,315.03 km) |
| Southgate to Moita | 993.69 mi (1,599.18 km) |
| Southgate to Moncao | 768.25 mi (1,236.37 km) |
