| Frondenberg to Marco de Canavezes | 1,036.04 mi (1,667.34 km) |
| Frondenberg to Marinha Grande | 1,138.25 mi (1,831.83 km) |
| Frondenberg to Massama | 1,203.40 mi (1,936.69 km) |
| Frondenberg to Matosinhos | 1,055.06 mi (1,697.96 km) |
| Frondenberg to Mealhada | 1,088.23 mi (1,751.33 km) |
| Frondenberg to Melgaco | 992.63 mi (1,597.49 km) |
| Frondenberg to Melres | 1,050.68 mi (1,690.91 km) |
| Frondenberg to Mira | 1,095.19 mi (1,762.54 km) |
| Frondenberg to Miranda do Corvo | 1,099.43 mi (1,769.36 km) |
| Frondenberg to Mirandela | 987.34 mi (1,588.98 km) |
| Frondenberg to Mogadouro | 979.88 mi (1,576.96 km) |
| Frondenberg to Moimenta da Beira | 1,028.50 mi (1,655.21 km) |
| Frondenberg to Moita | 1,199.76 mi (1,930.82 km) |
| Frondenberg to Moncao | 1,002.39 mi (1,613.19 km) |
| Frondenberg to Montalegre | 990.74 mi (1,594.44 km) |
