| Desborough to Mangualde | 880.89 mi (1,417.65 km) |
| Desborough to Marco de Canavezes | 850.49 mi (1,368.73 km) |
| Desborough to Marinha Grande | 957.71 mi (1,541.28 km) |
| Desborough to Massama | 1,028.36 mi (1,654.98 km) |
| Desborough to Matosinhos | 861.25 mi (1,386.05 km) |
| Desborough to Mealhada | 907.71 mi (1,460.81 km) |
| Desborough to Melgaco | 793.15 mi (1,276.45 km) |
| Desborough to Melres | 862.77 mi (1,388.50 km) |
| Desborough to Mira | 909.89 mi (1,464.32 km) |
| Desborough to Miranda do Corvo | 923.88 mi (1,486.84 km) |
| Desborough to Mirandela | 813.43 mi (1,309.09 km) |
| Desborough to Mogadouro | 815.70 mi (1,312.75 km) |
| Desborough to Moimenta da Beira | 853.86 mi (1,374.15 km) |
| Desborough to Moita | 1,029.90 mi (1,657.46 km) |
| Desborough to Moncao | 800.28 mi (1,287.93 km) |
