| Silla to Mangualde | 398.39 mi (641.14 km) |
| Silla to Marco de Canavezes | 426.80 mi (686.88 km) |
| Silla to Marinha Grande | 454.65 mi (731.69 km) |
| Silla to Massama | 477.22 mi (768.02 km) |
| Silla to Matosinhos | 454.56 mi (731.54 km) |
| Silla to Mealhada | 431.97 mi (695.18 km) |
| Silla to Melgaco | 452.96 mi (728.97 km) |
| Silla to Melres | 437.52 mi (704.12 km) |
| Silla to Mira | 447.18 mi (719.66 km) |
| Silla to Miranda do Corvo | 423.93 mi (682.26 km) |
| Silla to Mirandela | 385.06 mi (619.70 km) |
| Silla to Mogadouro | 358.82 mi (577.47 km) |
| Silla to Moimenta da Beira | 396.26 mi (637.71 km) |
| Silla to Moita | 462.74 mi (744.70 km) |
| Silla to Moncao | 462.01 mi (743.53 km) |
