| Antrim to Mangualde | 977.74 mi (1,573.52 km) |
| Antrim to Marco de Canavezes | 939.33 mi (1,511.71 km) |
| Antrim to Marinha Grande | 1,041.83 mi (1,676.66 km) |
| Antrim to Massama | 1,112.03 mi (1,789.64 km) |
| Antrim to Matosinhos | 942.05 mi (1,516.09 km) |
| Antrim to Mealhada | 995.77 mi (1,602.53 km) |
| Antrim to Melgaco | 875.63 mi (1,409.20 km) |
| Antrim to Melres | 948.51 mi (1,526.48 km) |
| Antrim to Mira | 993.77 mi (1,599.32 km) |
| Antrim to Miranda do Corvo | 1,014.73 mi (1,633.04 km) |
| Antrim to Mirandela | 915.33 mi (1,473.08 km) |
| Antrim to Mogadouro | 925.04 mi (1,488.71 km) |
| Antrim to Moimenta da Beira | 951.37 mi (1,531.08 km) |
| Antrim to Moita | 1,117.70 mi (1,798.76 km) |
| Antrim to Moncao | 879.70 mi (1,415.75 km) |
