| Karlsruhe to Marco de Canavezes | 968.47 mi (1,558.59 km) |
| Karlsruhe to Marinha Grande | 1,064.59 mi (1,713.30 km) |
| Karlsruhe to Massama | 1,125.21 mi (1,810.85 km) |
| Karlsruhe to Matosinhos | 990.64 mi (1,594.28 km) |
| Karlsruhe to Mealhada | 1,016.30 mi (1,635.58 km) |
| Karlsruhe to Melgaco | 933.56 mi (1,502.42 km) |
| Karlsruhe to Melres | 983.63 mi (1,583.00 km) |
| Karlsruhe to Mira | 1,025.23 mi (1,649.95 km) |
| Karlsruhe to Miranda do Corvo | 1,024.82 mi (1,649.29 km) |
| Karlsruhe to Mirandela | 916.47 mi (1,474.92 km) |
| Karlsruhe to Mogadouro | 904.92 mi (1,456.34 km) |
| Karlsruhe to Moimenta da Beira | 956.19 mi (1,538.84 km) |
| Karlsruhe to Moita | 1,119.33 mi (1,801.39 km) |
| Karlsruhe to Moncao | 944.15 mi (1,519.46 km) |
| Karlsruhe to Montalegre | 926.35 mi (1,490.82 km) |
