| Helena to Mangualde | 4,826.69 mi (7,767.81 km) |
| Helena to Marco de Canavezes | 4,784.12 mi (7,699.30 km) |
| Helena to Marinha Grande | 4,824.17 mi (7,763.76 km) |
| Helena to Massama | 4,859.32 mi (7,820.31 km) |
| Helena to Matosinhos | 4,763.68 mi (7,666.40 km) |
| Helena to Mealhada | 4,811.70 mi (7,743.68 km) |
| Helena to Melgaco | 4,734.75 mi (7,619.84 km) |
| Helena to Melres | 4,780.48 mi (7,693.43 km) |
| Helena to Mira | 4,798.64 mi (7,722.67 km) |
| Helena to Miranda do Corvo | 4,829.83 mi (7,772.86 km) |
| Helena to Mirandela | 4,805.18 mi (7,733.19 km) |
| Helena to Mogadouro | 4,829.65 mi (7,772.57 km) |
| Helena to Moimenta da Beira | 4,813.89 mi (7,747.20 km) |
| Helena to Moita | 4,875.68 mi (7,846.65 km) |
| Helena to Moncao | 4,728.99 mi (7,610.57 km) |
