| Spondon to Mangualde | 901.74 mi (1,451.21 km) |
| Spondon to Marco de Canavezes | 870.00 mi (1,400.13 km) |
| Spondon to Marinha Grande | 977.03 mi (1,572.38 km) |
| Spondon to Massama | 1,047.90 mi (1,686.43 km) |
| Spondon to Matosinhos | 879.62 mi (1,415.62 km) |
| Spondon to Mealhada | 927.39 mi (1,492.49 km) |
| Spondon to Melgaco | 811.38 mi (1,305.79 km) |
| Spondon to Melres | 881.89 mi (1,419.26 km) |
| Spondon to Mira | 928.96 mi (1,495.02 km) |
| Spondon to Miranda do Corvo | 944.05 mi (1,519.30 km) |
| Spondon to Mirandela | 834.68 mi (1,343.29 km) |
| Spondon to Mogadouro | 838.07 mi (1,348.75 km) |
| Spondon to Moimenta da Beira | 874.67 mi (1,407.65 km) |
| Spondon to Moita | 1,050.05 mi (1,689.89 km) |
| Spondon to Moncao | 818.10 mi (1,316.60 km) |
