| West Little River to Mangualde | 4,193.12 mi (6,748.17 km) |
| West Little River to Marco de Canavezes | 4,166.20 mi (6,704.85 km) |
| West Little River to Marinha Grande | 4,142.58 mi (6,666.83 km) |
| West Little River to Massama | 4,136.78 mi (6,657.50 km) |
| West Little River to Matosinhos | 4,137.99 mi (6,659.45 km) |
| West Little River to Mealhada | 4,160.15 mi (6,695.12 km) |
| West Little River to Melgaco | 4,149.74 mi (6,678.37 km) |
| West Little River to Melres | 4,154.72 mi (6,686.37 km) |
| West Little River to Mira | 4,144.88 mi (6,670.53 km) |
| West Little River to Miranda do Corvo | 4,169.63 mi (6,710.38 km) |
| West Little River to Mirandela | 4,212.11 mi (6,778.73 km) |
| West Little River to Mogadouro | 4,237.69 mi (6,819.90 km) |
| West Little River to Moimenta da Beira | 4,196.13 mi (6,753.02 km) |
| West Little River to Moita | 4,153.58 mi (6,684.54 km) |
| West Little River to Moncao | 4,139.41 mi (6,661.74 km) |
