| Herisau to Mangualde | 964.39 mi (1,552.04 km) |
| Herisau to Marco de Canavezes | 959.21 mi (1,543.71 km) |
| Herisau to Marinha Grande | 1,049.03 mi (1,688.25 km) |
| Herisau to Massama | 1,105.22 mi (1,778.69 km) |
| Herisau to Matosinhos | 983.44 mi (1,582.70 km) |
| Herisau to Mealhada | 1,002.84 mi (1,613.91 km) |
| Herisau to Melgaco | 931.49 mi (1,499.10 km) |
| Herisau to Melres | 974.52 mi (1,568.33 km) |
| Herisau to Mira | 1,013.17 mi (1,630.54 km) |
| Herisau to Miranda do Corvo | 1,009.10 mi (1,623.98 km) |
| Herisau to Mirandela | 905.61 mi (1,457.43 km) |
| Herisau to Mogadouro | 891.04 mi (1,434.00 km) |
| Herisau to Moimenta da Beira | 943.44 mi (1,518.32 km) |
| Herisau to Moita | 1,097.63 mi (1,766.47 km) |
| Herisau to Moncao | 942.52 mi (1,516.83 km) |
