| Mackworth to Mangualde | 900.14 mi (1,448.63 km) |
| Mackworth to Marco de Canavezes | 868.21 mi (1,397.24 km) |
| Mackworth to Marinha Grande | 975.20 mi (1,569.43 km) |
| Mackworth to Massama | 1,046.08 mi (1,683.51 km) |
| Mackworth to Matosinhos | 877.66 mi (1,412.46 km) |
| Mackworth to Mealhada | 925.61 mi (1,489.62 km) |
| Mackworth to Melgaco | 809.41 mi (1,302.62 km) |
| Mackworth to Melres | 880.03 mi (1,416.28 km) |
| Mackworth to Mira | 927.09 mi (1,492.01 km) |
| Mackworth to Miranda do Corvo | 942.34 mi (1,516.55 km) |
| Mackworth to Mirandela | 833.16 mi (1,340.84 km) |
| Mackworth to Mogadouro | 836.72 mi (1,346.57 km) |
| Mackworth to Moimenta da Beira | 873.07 mi (1,405.07 km) |
| Mackworth to Moita | 1,048.32 mi (1,687.11 km) |
| Mackworth to Moncao | 816.07 mi (1,313.33 km) |
