| Walthamstow to Mangualde | 843.31 mi (1,357.17 km) |
| Walthamstow to Marco de Canavezes | 815.24 mi (1,312.00 km) |
| Walthamstow to Marinha Grande | 922.39 mi (1,484.44 km) |
| Walthamstow to Massama | 992.48 mi (1,597.23 km) |
| Walthamstow to Matosinhos | 827.85 mi (1,332.29 km) |
| Walthamstow to Mealhada | 871.96 mi (1,403.29 km) |
| Walthamstow to Melgaco | 760.28 mi (1,223.56 km) |
| Walthamstow to Melres | 828.14 mi (1,332.76 km) |
| Walthamstow to Mira | 875.14 mi (1,408.40 km) |
| Walthamstow to Miranda do Corvo | 887.29 mi (1,427.95 km) |
| Walthamstow to Mirandela | 775.44 mi (1,247.96 km) |
| Walthamstow to Mogadouro | 775.86 mi (1,248.62 km) |
| Walthamstow to Moimenta da Beira | 816.43 mi (1,313.92 km) |
| Walthamstow to Moita | 993.02 mi (1,598.11 km) |
| Walthamstow to Moncao | 768.08 mi (1,236.10 km) |
