| Spelle to Marco de Canavezes | 1,064.76 mi (1,713.57 km) |
| Spelle to Marinha Grande | 1,168.51 mi (1,880.53 km) |
| Spelle to Massama | 1,234.92 mi (1,987.41 km) |
| Spelle to Matosinhos | 1,082.61 mi (1,742.29 km) |
| Spelle to Mealhada | 1,118.14 mi (1,799.48 km) |
| Spelle to Melgaco | 1,018.74 mi (1,639.50 km) |
| Spelle to Melres | 1,079.14 mi (1,736.71 km) |
| Spelle to Mira | 1,124.40 mi (1,809.55 km) |
| Spelle to Miranda do Corvo | 1,130.20 mi (1,818.88 km) |
| Spelle to Mirandela | 1,017.48 mi (1,637.47 km) |
| Spelle to Mogadouro | 1,011.43 mi (1,627.73 km) |
| Spelle to Moimenta da Beira | 1,058.87 mi (1,704.09 km) |
| Spelle to Moita | 1,232.05 mi (1,982.79 km) |
| Spelle to Moncao | 1,028.14 mi (1,654.63 km) |
| Spelle to Montalegre | 1,018.66 mi (1,639.38 km) |
