| Mont-de-Marsan to Marco de Canavezes | 431.81 mi (694.93 km) |
| Mont-de-Marsan to Marinha Grande | 519.57 mi (836.17 km) |
| Mont-de-Marsan to Massama | 576.60 mi (927.94 km) |
| Mont-de-Marsan to Matosinhos | 457.17 mi (735.75 km) |
| Mont-de-Marsan to Mealhada | 473.62 mi (762.22 km) |
| Mont-de-Marsan to Melgaco | 410.94 mi (661.34 km) |
| Mont-de-Marsan to Melres | 447.09 mi (719.51 km) |
| Mont-de-Marsan to Mira | 484.28 mi (779.37 km) |
| Mont-de-Marsan to Miranda do Corvo | 479.64 mi (771.91 km) |
| Mont-de-Marsan to Mirandela | 377.68 mi (607.82 km) |
| Mont-de-Marsan to Mogadouro | 361.98 mi (582.56 km) |
| Mont-de-Marsan to Moimenta da Beira | 414.54 mi (667.14 km) |
| Mont-de-Marsan to Moita | 569.70 mi (916.85 km) |
| Mont-de-Marsan to Moncao | 422.24 mi (679.53 km) |
| Mont-de-Marsan to Montalegre | 395.80 mi (636.97 km) |
