| Merchtem to Marco de Canavezes | 897.15 mi (1,443.83 km) |
| Merchtem to Marinha Grande | 1,001.50 mi (1,611.76 km) |
| Merchtem to Massama | 1,068.52 mi (1,719.62 km) |
| Merchtem to Matosinhos | 914.56 mi (1,471.83 km) |
| Merchtem to Mealhada | 951.02 mi (1,530.52 km) |
| Merchtem to Melgaco | 850.30 mi (1,368.43 km) |
| Merchtem to Melres | 911.42 mi (1,466.79 km) |
| Merchtem to Mira | 956.95 mi (1,540.06 km) |
| Merchtem to Miranda do Corvo | 963.50 mi (1,550.60 km) |
| Merchtem to Mirandela | 850.56 mi (1,368.85 km) |
| Merchtem to Mogadouro | 845.31 mi (1,360.40 km) |
| Merchtem to Moimenta da Beira | 892.03 mi (1,435.59 km) |
| Merchtem to Moita | 1,066.11 mi (1,715.74 km) |
| Merchtem to Moncao | 859.62 mi (1,383.42 km) |
| Merchtem to Montalegre | 850.79 mi (1,369.21 km) |
