| Nairn to Mangualde | 1,185.98 mi (1,908.66 km) |
| Nairn to Marco de Canavezes | 1,148.99 mi (1,849.12 km) |
| Nairn to Marinha Grande | 1,252.97 mi (2,016.47 km) |
| Nairn to Massama | 1,323.59 mi (2,130.11 km) |
| Nairn to Matosinhos | 1,153.24 mi (1,855.96 km) |
| Nairn to Mealhada | 1,205.93 mi (1,940.75 km) |
| Nairn to Melgaco | 1,086.06 mi (1,747.85 km) |
| Nairn to Melres | 1,158.83 mi (1,864.95 km) |
| Nairn to Mira | 1,204.71 mi (1,938.79 km) |
| Nairn to Miranda do Corvo | 1,224.45 mi (1,970.56 km) |
| Nairn to Mirandela | 1,121.99 mi (1,805.67 km) |
| Nairn to Mogadouro | 1,129.96 mi (1,818.50 km) |
| Nairn to Moimenta da Beira | 1,159.29 mi (1,865.70 km) |
| Nairn to Moita | 1,328.53 mi (2,138.07 km) |
| Nairn to Moncao | 1,090.72 mi (1,755.35 km) |
