| Grimbergen to Marco de Canavezes | 900.27 mi (1,448.84 km) |
| Grimbergen to Marinha Grande | 1,004.45 mi (1,616.50 km) |
| Grimbergen to Massama | 1,071.32 mi (1,724.12 km) |
| Grimbergen to Matosinhos | 917.82 mi (1,477.09 km) |
| Grimbergen to Mealhada | 953.99 mi (1,535.30 km) |
| Grimbergen to Melgaco | 853.73 mi (1,373.94 km) |
| Grimbergen to Melres | 914.57 mi (1,471.86 km) |
| Grimbergen to Mira | 960.02 mi (1,545.00 km) |
| Grimbergen to Miranda do Corvo | 966.36 mi (1,555.21 km) |
| Grimbergen to Mirandela | 853.47 mi (1,373.53 km) |
| Grimbergen to Mogadouro | 848.03 mi (1,364.77 km) |
| Grimbergen to Moimenta da Beira | 894.93 mi (1,440.25 km) |
| Grimbergen to Moita | 1,068.81 mi (1,720.08 km) |
| Grimbergen to Moncao | 863.09 mi (1,389.01 km) |
| Grimbergen to Montalegre | 853.99 mi (1,374.36 km) |
