| Naples to Marco de Canavezes | 1,164.93 mi (1,874.77 km) |
| Naples to Marinha Grande | 1,220.52 mi (1,964.25 km) |
| Naples to Massama | 1,253.26 mi (2,016.93 km) |
| Naples to Matosinhos | 1,193.35 mi (1,920.51 km) |
| Naples to Mealhada | 1,187.78 mi (1,911.54 km) |
| Naples to Melgaco | 1,165.62 mi (1,875.88 km) |
| Naples to Melres | 1,178.76 mi (1,897.04 km) |
| Naples to Mira | 1,201.97 mi (1,934.38 km) |
| Naples to Miranda do Corvo | 1,184.89 mi (1,906.89 km) |
| Naples to Mirandela | 1,112.92 mi (1,791.06 km) |
| Naples to Mogadouro | 1,089.82 mi (1,753.90 km) |
| Naples to Moimenta da Beira | 1,138.75 mi (1,832.65 km) |
| Naples to Moita | 1,239.84 mi (1,995.33 km) |
| Naples to Moncao | 1,176.71 mi (1,893.74 km) |
| Naples to Montalegre | 1,142.53 mi (1,838.73 km) |
