| Silleda to Mangualde | 146.84 mi (236.32 km) |
| Silleda to Marco de Canavezes | 104.88 mi (168.79 km) |
| Silleda to Marinha Grande | 207.04 mi (333.20 km) |
| Silleda to Massama | 277.85 mi (447.15 km) |
| Silleda to Matosinhos | 107.50 mi (173.01 km) |
| Silleda to Mealhada | 160.46 mi (258.24 km) |
| Silleda to Melgaco | 40.34 mi (64.92 km) |
| Silleda to Melres | 113.18 mi (182.14 km) |
| Silleda to Mira | 158.73 mi (255.45 km) |
| Silleda to Miranda do Corvo | 179.72 mi (289.23 km) |
| Silleda to Mirandela | 99.75 mi (160.54 km) |
| Silleda to Mogadouro | 122.38 mi (196.95 km) |
| Silleda to Moimenta da Beira | 123.07 mi (198.06 km) |
| Silleda to Moita | 282.57 mi (454.75 km) |
| Silleda to Moncao | 45.09 mi (72.57 km) |
