| Middelkerke to Marco de Canavezes | 865.70 mi (1,393.21 km) |
| Middelkerke to Marinha Grande | 971.34 mi (1,563.22 km) |
| Middelkerke to Massama | 1,039.56 mi (1,673.01 km) |
| Middelkerke to Matosinhos | 881.67 mi (1,418.91 km) |
| Middelkerke to Mealhada | 920.69 mi (1,481.71 km) |
| Middelkerke to Melgaco | 816.10 mi (1,313.39 km) |
| Middelkerke to Melres | 879.60 mi (1,415.58 km) |
| Middelkerke to Mira | 925.77 mi (1,489.89 km) |
| Middelkerke to Miranda do Corvo | 934.12 mi (1,503.32 km) |
| Middelkerke to Mirandela | 821.03 mi (1,321.32 km) |
| Middelkerke to Mogadouro | 817.55 mi (1,315.71 km) |
| Middelkerke to Moimenta da Beira | 862.55 mi (1,388.14 km) |
| Middelkerke to Moita | 1,038.09 mi (1,670.64 km) |
| Middelkerke to Moncao | 824.99 mi (1,327.69 km) |
| Middelkerke to Montalegre | 818.65 mi (1,317.49 km) |
