| Socorro to Mangualde | 5,234.99 mi (8,424.91 km) |
| Socorro to Marco de Canavezes | 5,197.60 mi (8,364.73 km) |
| Socorro to Marinha Grande | 5,210.15 mi (8,384.92 km) |
| Socorro to Massama | 5,227.75 mi (8,413.25 km) |
| Socorro to Matosinhos | 5,172.64 mi (8,324.55 km) |
| Socorro to Mealhada | 5,211.02 mi (8,386.32 km) |
| Socorro to Melgaco | 5,160.88 mi (8,305.63 km) |
| Socorro to Melres | 5,190.20 mi (8,352.81 km) |
| Socorro to Mira | 5,196.33 mi (8,362.68 km) |
| Socorro to Miranda do Corvo | 5,226.00 mi (8,410.43 km) |
| Socorro to Mirandela | 5,230.99 mi (8,418.46 km) |
| Socorro to Mogadouro | 5,257.11 mi (8,460.50 km) |
| Socorro to Moimenta da Beira | 5,228.84 mi (8,415.01 km) |
| Socorro to Moita | 5,245.07 mi (8,441.12 km) |
| Socorro to Moncao | 5,152.77 mi (8,292.58 km) |
