| Castellabate to Marco de Canavezes | 1,207.66 mi (1,943.55 km) |
| Castellabate to Marinha Grande | 1,260.68 mi (2,028.88 km) |
| Castellabate to Massama | 1,291.58 mi (2,078.60 km) |
| Castellabate to Matosinhos | 1,236.16 mi (1,989.41 km) |
| Castellabate to Mealhada | 1,229.05 mi (1,977.96 km) |
| Castellabate to Melgaco | 1,210.04 mi (1,947.38 km) |
| Castellabate to Melres | 1,221.32 mi (1,965.52 km) |
| Castellabate to Mira | 1,243.40 mi (2,001.05 km) |
| Castellabate to Miranda do Corvo | 1,225.58 mi (1,972.38 km) |
| Castellabate to Mirandela | 1,156.11 mi (1,860.58 km) |
| Castellabate to Mogadouro | 1,132.67 mi (1,822.86 km) |
| Castellabate to Moimenta da Beira | 1,181.03 mi (1,900.68 km) |
| Castellabate to Moita | 1,277.83 mi (2,056.47 km) |
| Castellabate to Moncao | 1,221.07 mi (1,965.13 km) |
| Castellabate to Montalegre | 1,186.41 mi (1,909.34 km) |
