| Silves to Mangualde | 238.91 mi (384.48 km) |
| Silves to Marco de Canavezes | 276.56 mi (445.08 km) |
| Silves to Marinha Grande | 179.10 mi (288.23 km) |
| Silves to Massama | 117.64 mi (189.32 km) |
| Silves to Matosinhos | 276.48 mi (444.95 km) |
| Silves to Mealhada | 220.85 mi (355.42 km) |
| Silves to Melgaco | 340.74 mi (548.37 km) |
| Silves to Melres | 268.08 mi (431.43 km) |
| Silves to Mira | 224.86 mi (361.88 km) |
| Silves to Miranda do Corvo | 201.36 mi (324.05 km) |
| Silves to Mirandela | 304.48 mi (490.02 km) |
| Silves to Mogadouro | 300.92 mi (484.28 km) |
| Silves to Moimenta da Beira | 265.76 mi (427.71 km) |
| Silves to Moita | 105.35 mi (169.55 km) |
| Silves to Moncao | 337.62 mi (543.35 km) |
