| Pornic to Marco de Canavezes | 507.46 mi (816.68 km) |
| Pornic to Marinha Grande | 613.00 mi (986.53 km) |
| Pornic to Massama | 681.34 mi (1,096.51 km) |
| Pornic to Matosinhos | 523.96 mi (843.23 km) |
| Pornic to Mealhada | 562.34 mi (905.01 km) |
| Pornic to Melgaco | 459.25 mi (739.09 km) |
| Pornic to Melres | 521.46 mi (839.21 km) |
| Pornic to Mira | 567.50 mi (913.30 km) |
| Pornic to Miranda do Corvo | 575.86 mi (926.75 km) |
| Pornic to Mirandela | 462.80 mi (744.80 km) |
| Pornic to Mogadouro | 460.01 mi (740.31 km) |
| Pornic to Moimenta da Beira | 504.30 mi (811.59 km) |
| Pornic to Moita | 680.14 mi (1,094.58 km) |
| Pornic to Moncao | 468.52 mi (754.01 km) |
| Pornic to Montalegre | 460.58 mi (741.24 km) |
