| Nettuno to Marco de Canavezes | 1,077.69 mi (1,734.38 km) |
| Nettuno to Marinha Grande | 1,136.21 mi (1,828.56 km) |
| Nettuno to Massama | 1,171.19 mi (1,884.85 km) |
| Nettuno to Matosinhos | 1,106.01 mi (1,779.95 km) |
| Nettuno to Mealhada | 1,102.19 mi (1,773.80 km) |
| Nettuno to Melgaco | 1,076.60 mi (1,732.62 km) |
| Nettuno to Melres | 1,091.72 mi (1,756.95 km) |
| Nettuno to Mira | 1,116.19 mi (1,796.33 km) |
| Nettuno to Miranda do Corvo | 1,099.98 mi (1,770.24 km) |
| Nettuno to Mirandela | 1,025.23 mi (1,649.94 km) |
| Nettuno to Mogadouro | 1,002.53 mi (1,613.42 km) |
| Nettuno to Moimenta da Beira | 1,052.06 mi (1,693.12 km) |
| Nettuno to Moita | 1,158.19 mi (1,863.92 km) |
| Nettuno to Moncao | 1,087.75 mi (1,750.56 km) |
| Nettuno to Montalegre | 1,054.09 mi (1,696.40 km) |
