| Knowle to Mangualde | 862.46 mi (1,388.00 km) |
| Knowle to Marco de Canavezes | 830.78 mi (1,337.02 km) |
| Knowle to Marinha Grande | 937.83 mi (1,509.30 km) |
| Knowle to Massama | 1,008.69 mi (1,623.32 km) |
| Knowle to Matosinhos | 840.49 mi (1,352.65 km) |
| Knowle to Mealhada | 888.16 mi (1,429.36 km) |
| Knowle to Melgaco | 772.26 mi (1,242.84 km) |
| Knowle to Melres | 842.70 mi (1,356.19 km) |
| Knowle to Mira | 889.78 mi (1,431.96 km) |
| Knowle to Miranda do Corvo | 904.80 mi (1,456.13 km) |
| Knowle to Mirandela | 795.41 mi (1,280.08 km) |
| Knowle to Mogadouro | 798.81 mi (1,285.56 km) |
| Knowle to Moimenta da Beira | 835.40 mi (1,344.45 km) |
| Knowle to Moita | 1,010.80 mi (1,626.73 km) |
| Knowle to Moncao | 779.02 mi (1,253.71 km) |
