| Onda to Mangualde | 397.52 mi (639.75 km) |
| Onda to Marco de Canavezes | 422.22 mi (679.50 km) |
| Onda to Marinha Grande | 459.88 mi (740.10 km) |
| Onda to Massama | 488.31 mi (785.86 km) |
| Onda to Matosinhos | 450.51 mi (725.03 km) |
| Onda to Mealhada | 433.00 mi (696.85 km) |
| Onda to Melgaco | 442.61 mi (712.31 km) |
| Onda to Melres | 433.96 mi (698.38 km) |
| Onda to Mira | 447.98 mi (720.95 km) |
| Onda to Miranda do Corvo | 426.87 mi (686.97 km) |
| Onda to Mirandela | 377.09 mi (606.86 km) |
| Onda to Mogadouro | 351.19 mi (565.18 km) |
| Onda to Moimenta da Beira | 392.53 mi (631.71 km) |
| Onda to Moita | 474.69 mi (763.94 km) |
| Onda to Moncao | 452.24 mi (727.81 km) |
