| Rialto to Mangualde | 5,606.69 mi (9,023.10 km) |
| Rialto to Marco de Canavezes | 5,566.14 mi (8,957.83 km) |
| Rialto to Marinha Grande | 5,593.68 mi (9,002.16 km) |
| Rialto to Massama | 5,620.73 mi (9,045.69 km) |
| Rialto to Matosinhos | 5,543.43 mi (8,921.28 km) |
| Rialto to Mealhada | 5,587.39 mi (8,992.03 km) |
| Rialto to Melgaco | 5,522.10 mi (8,886.97 km) |
| Rialto to Melres | 5,560.73 mi (8,949.12 km) |
| Rialto to Mira | 5,573.45 mi (8,969.61 km) |
| Rialto to Miranda do Corvo | 5,604.20 mi (9,019.09 km) |
| Rialto to Mirandela | 5,593.00 mi (9,001.06 km) |
| Rialto to Mogadouro | 5,618.42 mi (9,041.97 km) |
| Rialto to Moimenta da Beira | 5,596.84 mi (9,007.24 km) |
| Rialto to Moita | 5,637.70 mi (9,073.00 km) |
| Rialto to Moncao | 5,515.23 mi (8,875.90 km) |
