| Killingworth to Mangualde | 1,036.58 mi (1,668.22 km) |
| Killingworth to Marco de Canavezes | 1,002.95 mi (1,614.09 km) |
| Killingworth to Marinha Grande | 1,109.34 mi (1,785.31 km) |
| Killingworth to Massama | 1,180.35 mi (1,899.59 km) |
| Killingworth to Matosinhos | 1,010.74 mi (1,626.63 km) |
| Killingworth to Mealhada | 1,060.40 mi (1,706.55 km) |
| Killingworth to Melgaco | 942.55 mi (1,516.89 km) |
| Killingworth to Melres | 1,014.18 mi (1,632.16 km) |
| Killingworth to Mira | 1,061.02 mi (1,707.55 km) |
| Killingworth to Miranda do Corvo | 1,077.75 mi (1,734.47 km) |
| Killingworth to Mirandela | 970.31 mi (1,561.56 km) |
| Killingworth to Mogadouro | 975.21 mi (1,569.45 km) |
| Killingworth to Moimenta da Beira | 1,009.55 mi (1,624.71 km) |
| Killingworth to Moita | 1,183.45 mi (1,904.58 km) |
| Killingworth to Moncao | 948.57 mi (1,526.58 km) |
