| Karlsfeld to Marco de Canavezes | 1,074.81 mi (1,729.74 km) |
| Karlsfeld to Marinha Grande | 1,165.52 mi (1,875.73 km) |
| Karlsfeld to Massama | 1,222.13 mi (1,966.83 km) |
| Karlsfeld to Matosinhos | 1,098.73 mi (1,768.23 km) |
| Karlsfeld to Mealhada | 1,119.06 mi (1,800.95 km) |
| Karlsfeld to Melgaco | 1,045.75 mi (1,682.97 km) |
| Karlsfeld to Melres | 1,090.11 mi (1,754.35 km) |
| Karlsfeld to Mira | 1,129.22 mi (1,817.30 km) |
| Karlsfeld to Miranda do Corvo | 1,125.58 mi (1,811.45 km) |
| Karlsfeld to Mirandela | 1,021.39 mi (1,643.77 km) |
| Karlsfeld to Mogadouro | 1,007.22 mi (1,620.97 km) |
| Karlsfeld to Moimenta da Beira | 1,059.52 mi (1,705.13 km) |
| Karlsfeld to Moita | 1,214.64 mi (1,954.78 km) |
| Karlsfeld to Moncao | 1,056.69 mi (1,700.58 km) |
| Karlsfeld to Montalegre | 1,035.35 mi (1,666.24 km) |
