| Enns to Marco de Canavezes | 1,206.95 mi (1,942.39 km) |
| Enns to Marinha Grande | 1,295.40 mi (2,084.74 km) |
| Enns to Massama | 1,350.21 mi (2,172.95 km) |
| Enns to Matosinhos | 1,231.41 mi (1,981.76 km) |
| Enns to Mealhada | 1,249.77 mi (2,011.31 km) |
| Enns to Melgaco | 1,179.88 mi (1,898.84 km) |
| Enns to Melres | 1,222.25 mi (1,967.02 km) |
| Enns to Mira | 1,260.36 mi (2,028.36 km) |
| Enns to Miranda do Corvo | 1,255.50 mi (2,020.54 km) |
| Enns to Mirandela | 1,153.17 mi (1,855.85 km) |
| Enns to Mogadouro | 1,138.11 mi (1,831.60 km) |
| Enns to Moimenta da Beira | 1,190.62 mi (1,916.11 km) |
| Enns to Moita | 1,342.06 mi (2,159.84 km) |
| Enns to Moncao | 1,190.91 mi (1,916.59 km) |
| Enns to Montalegre | 1,168.50 mi (1,880.52 km) |
