| Defiance to Mangualde | 3,857.88 mi (6,208.66 km) |
| Defiance to Marco de Canavezes | 3,821.31 mi (6,149.80 km) |
| Defiance to Marinha Grande | 3,830.89 mi (6,165.21 km) |
| Defiance to Massama | 3,847.23 mi (6,191.52 km) |
| Defiance to Matosinhos | 3,795.89 mi (6,108.90 km) |
| Defiance to Mealhada | 3,833.01 mi (6,168.63 km) |
| Defiance to Melgaco | 3,786.56 mi (6,093.88 km) |
| Defiance to Melres | 3,813.46 mi (6,137.18 km) |
| Defiance to Mira | 3,818.21 mi (6,144.81 km) |
| Defiance to Miranda do Corvo | 3,847.61 mi (6,192.13 km) |
| Defiance to Mirandela | 3,856.21 mi (6,205.97 km) |
| Defiance to Mogadouro | 3,882.42 mi (6,248.16 km) |
| Defiance to Moimenta da Beira | 3,852.58 mi (6,200.13 km) |
| Defiance to Moita | 3,864.56 mi (6,219.41 km) |
| Defiance to Moncao | 3,778.14 mi (6,080.34 km) |
