| Sines to Mangualde | 192.33 mi (309.53 km) |
| Sines to Marco de Canavezes | 226.29 mi (364.18 km) |
| Sines to Marinha Grande | 124.10 mi (199.72 km) |
| Sines to Massama | 59.71 mi (96.10 km) |
| Sines to Matosinhos | 223.25 mi (359.28 km) |
| Sines to Mealhada | 169.26 mi (272.40 km) |
| Sines to Melgaco | 289.30 mi (465.58 km) |
| Sines to Melres | 216.44 mi (348.32 km) |
| Sines to Mira | 171.40 mi (275.84 km) |
| Sines to Miranda do Corvo | 150.94 mi (242.92 km) |
| Sines to Mirandela | 259.80 mi (418.11 km) |
| Sines to Mogadouro | 259.88 mi (418.24 km) |
| Sines to Moimenta da Beira | 219.39 mi (353.07 km) |
| Sines to Moita | 48.47 mi (78.01 km) |
| Sines to Moncao | 285.29 mi (459.13 km) |
