| Rianxo to Mangualde | 151.50 mi (243.81 km) |
| Rianxo to Marco de Canavezes | 106.98 mi (172.16 km) |
| Rianxo to Marinha Grande | 200.46 mi (322.61 km) |
| Rianxo to Massama | 270.06 mi (434.62 km) |
| Rianxo to Matosinhos | 101.52 mi (163.38 km) |
| Rianxo to Mealhada | 157.76 mi (253.89 km) |
| Rianxo to Melgaco | 46.32 mi (74.55 km) |
| Rianxo to Melres | 111.48 mi (179.40 km) |
| Rianxo to Mira | 153.22 mi (246.58 km) |
| Rianxo to Miranda do Corvo | 177.96 mi (286.40 km) |
| Rianxo to Mirandela | 116.22 mi (187.04 km) |
| Rianxo to Mogadouro | 141.08 mi (227.05 km) |
| Rianxo to Moimenta da Beira | 130.98 mi (210.79 km) |
| Rianxo to Moita | 276.51 mi (445.00 km) |
| Rianxo to Moncao | 43.40 mi (69.84 km) |
