| Ano Syros to Marco de Canavezes | 1,774.55 mi (2,855.87 km) |
| Ano Syros to Marinha Grande | 1,822.97 mi (2,933.78 km) |
| Ano Syros to Massama | 1,849.45 mi (2,976.40 km) |
| Ano Syros to Matosinhos | 1,803.12 mi (2,901.84 km) |
| Ano Syros to Mealhada | 1,793.58 mi (2,886.49 km) |
| Ano Syros to Melgaco | 1,778.73 mi (2,862.59 km) |
| Ano Syros to Melres | 1,787.94 mi (2,877.41 km) |
| Ano Syros to Mira | 1,808.18 mi (2,909.98 km) |
| Ano Syros to Miranda do Corvo | 1,789.03 mi (2,879.17 km) |
| Ano Syros to Mirandela | 1,723.63 mi (2,773.92 km) |
| Ano Syros to Mogadouro | 1,699.79 mi (2,735.56 km) |
| Ano Syros to Moimenta da Beira | 1,747.29 mi (2,812.00 km) |
| Ano Syros to Moita | 1,834.93 mi (2,953.03 km) |
| Ano Syros to Moncao | 1,789.71 mi (2,880.26 km) |
| Ano Syros to Montalegre | 1,754.64 mi (2,823.81 km) |
