| Atherton to Mangualde | 925.73 mi (1,489.82 km) |
| Atherton to Marco de Canavezes | 892.03 mi (1,435.58 km) |
| Atherton to Marinha Grande | 998.43 mi (1,606.81 km) |
| Atherton to Massama | 1,069.44 mi (1,721.10 km) |
| Atherton to Matosinhos | 899.86 mi (1,448.18 km) |
| Atherton to Mealhada | 949.48 mi (1,528.05 km) |
| Atherton to Melgaco | 831.66 mi (1,338.43 km) |
| Atherton to Melres | 903.26 mi (1,453.66 km) |
| Atherton to Mira | 950.11 mi (1,529.06 km) |
| Atherton to Miranda do Corvo | 966.84 mi (1,555.98 km) |
| Atherton to Mirandela | 859.53 mi (1,383.28 km) |
| Atherton to Mogadouro | 864.64 mi (1,391.51 km) |
| Atherton to Moimenta da Beira | 898.70 mi (1,446.32 km) |
| Atherton to Moita | 1,072.53 mi (1,726.07 km) |
| Atherton to Moncao | 837.71 mi (1,348.17 km) |
