| Portimao to Mangualde | 243.18 mi (391.37 km) |
| Portimao to Marco de Canavezes | 280.35 mi (451.18 km) |
| Portimao to Marinha Grande | 181.81 mi (292.59 km) |
| Portimao to Massama | 118.90 mi (191.35 km) |
| Portimao to Matosinhos | 279.71 mi (450.15 km) |
| Portimao to Mealhada | 224.35 mi (361.06 km) |
| Portimao to Melgaco | 344.37 mi (554.22 km) |
| Portimao to Melres | 271.62 mi (437.14 km) |
| Portimao to Mira | 228.00 mi (366.93 km) |
| Portimao to Miranda do Corvo | 205.03 mi (329.96 km) |
| Portimao to Mirandela | 309.06 mi (497.39 km) |
| Portimao to Mogadouro | 305.87 mi (492.25 km) |
| Portimao to Moimenta da Beira | 270.10 mi (434.69 km) |
| Portimao to Moita | 107.32 mi (172.72 km) |
| Portimao to Moncao | 341.09 mi (548.93 km) |
