| Mont-Saint-Martin to Marco de Canavezes | 886.71 mi (1,427.03 km) |
| Mont-Saint-Martin to Marinha Grande | 987.05 mi (1,588.50 km) |
| Mont-Saint-Martin to Massama | 1,050.86 mi (1,691.20 km) |
| Mont-Saint-Martin to Matosinhos | 906.99 mi (1,459.66 km) |
| Mont-Saint-Martin to Mealhada | 937.50 mi (1,508.75 km) |
| Mont-Saint-Martin to Melgaco | 846.50 mi (1,362.31 km) |
| Mont-Saint-Martin to Melres | 901.59 mi (1,450.98 km) |
| Mont-Saint-Martin to Mira | 945.17 mi (1,521.10 km) |
| Mont-Saint-Martin to Miranda do Corvo | 947.82 mi (1,525.37 km) |
| Mont-Saint-Martin to Mirandela | 836.69 mi (1,346.52 km) |
| Mont-Saint-Martin to Mogadouro | 827.83 mi (1,332.26 km) |
| Mont-Saint-Martin to Moimenta da Beira | 877.47 mi (1,412.15 km) |
| Mont-Saint-Martin to Moita | 1,046.53 mi (1,684.22 km) |
| Mont-Saint-Martin to Moncao | 856.63 mi (1,378.62 km) |
| Mont-Saint-Martin to Montalegre | 842.47 mi (1,355.83 km) |
