| Iernut to Mangualde | 1,640.68 mi (2,640.43 km) |
| Iernut to Marco de Canavezes | 1,642.68 mi (2,643.64 km) |
| Iernut to Marinha Grande | 1,722.07 mi (2,771.41 km) |
| Iernut to Massama | 1,769.96 mi (2,848.47 km) |
| Iernut to Matosinhos | 1,668.86 mi (2,685.77 km) |
| Iernut to Mealhada | 1,679.94 mi (2,703.59 km) |
| Iernut to Melgaco | 1,623.27 mi (2,612.40 km) |
| Iernut to Melres | 1,657.84 mi (2,668.03 km) |
| Iernut to Mira | 1,691.93 mi (2,722.90 km) |
| Iernut to Miranda do Corvo | 1,682.86 mi (2,708.31 km) |
| Iernut to Mirandela | 1,588.29 mi (2,556.11 km) |
| Iernut to Mogadouro | 1,570.32 mi (2,527.18 km) |
| Iernut to Moimenta da Beira | 1,622.87 mi (2,611.76 km) |
| Iernut to Moita | 1,759.67 mi (2,831.91 km) |
| Iernut to Moncao | 1,634.53 mi (2,630.53 km) |
