| Altensteig to Marco de Canavezes | 963.47 mi (1,550.56 km) |
| Altensteig to Marinha Grande | 1,058.13 mi (1,702.89 km) |
| Altensteig to Massama | 1,117.70 mi (1,798.76 km) |
| Altensteig to Matosinhos | 986.20 mi (1,587.14 km) |
| Altensteig to Mealhada | 1,010.31 mi (1,625.93 km) |
| Altensteig to Melgaco | 930.35 mi (1,497.25 km) |
| Altensteig to Melres | 978.69 mi (1,575.05 km) |
| Altensteig to Mira | 1,019.60 mi (1,640.89 km) |
| Altensteig to Miranda do Corvo | 1,018.26 mi (1,638.74 km) |
| Altensteig to Mirandela | 910.99 mi (1,466.09 km) |
| Altensteig to Mogadouro | 898.66 mi (1,446.25 km) |
| Altensteig to Moimenta da Beira | 950.29 mi (1,529.34 km) |
| Altensteig to Moita | 1,111.38 mi (1,788.60 km) |
| Altensteig to Moncao | 941.06 mi (1,514.49 km) |
| Altensteig to Montalegre | 922.12 mi (1,484.01 km) |
