| Ciro Marina to Marco de Canavezes | 1,333.65 mi (2,146.30 km) |
| Ciro Marina to Marinha Grande | 1,383.56 mi (2,226.63 km) |
| Ciro Marina to Massama | 1,412.02 mi (2,272.42 km) |
| Ciro Marina to Matosinhos | 1,362.21 mi (2,192.26 km) |
| Ciro Marina to Mealhada | 1,353.32 mi (2,177.96 km) |
| Ciro Marina to Melgaco | 1,337.79 mi (2,152.97 km) |
| Ciro Marina to Melres | 1,347.09 mi (2,167.93 km) |
| Ciro Marina to Mira | 1,367.84 mi (2,201.33 km) |
| Ciro Marina to Miranda do Corvo | 1,349.16 mi (2,171.26 km) |
| Ciro Marina to Mirandela | 1,282.63 mi (2,064.20 km) |
| Ciro Marina to Mogadouro | 1,258.84 mi (2,025.91 km) |
| Ciro Marina to Moimenta da Beira | 1,306.52 mi (2,102.64 km) |
| Ciro Marina to Moita | 1,397.85 mi (2,249.63 km) |
| Ciro Marina to Moncao | 1,348.76 mi (2,170.61 km) |
| Ciro Marina to Montalegre | 1,313.62 mi (2,114.07 km) |
