| Piedras Blancas to Mangualde | 223.79 mi (360.15 km) |
| Piedras Blancas to Marco de Canavezes | 198.18 mi (318.94 km) |
| Piedras Blancas to Marinha Grande | 304.26 mi (489.66 km) |
| Piedras Blancas to Massama | 373.53 mi (601.14 km) |
| Piedras Blancas to Matosinhos | 215.15 mi (346.25 km) |
| Piedras Blancas to Mealhada | 253.60 mi (408.12 km) |
| Piedras Blancas to Melgaco | 153.00 mi (246.24 km) |
| Piedras Blancas to Melres | 212.15 mi (341.42 km) |
| Piedras Blancas to Mira | 258.26 mi (415.63 km) |
| Piedras Blancas to Miranda do Corvo | 268.07 mi (431.42 km) |
| Piedras Blancas to Mirandela | 155.94 mi (250.96 km) |
| Piedras Blancas to Mogadouro | 158.42 mi (254.94 km) |
| Piedras Blancas to Moimenta da Beira | 196.95 mi (316.96 km) |
| Piedras Blancas to Moita | 373.56 mi (601.19 km) |
| Piedras Blancas to Moncao | 163.26 mi (262.74 km) |
