| Merzig to Marco de Canavezes | 914.27 mi (1,471.38 km) |
| Merzig to Marinha Grande | 1,013.48 mi (1,631.04 km) |
| Merzig to Massama | 1,076.43 mi (1,732.34 km) |
| Merzig to Matosinhos | 935.12 mi (1,504.93 km) |
| Merzig to Mealhada | 964.25 mi (1,551.81 km) |
| Merzig to Melgaco | 875.56 mi (1,409.07 km) |
| Merzig to Melres | 929.25 mi (1,495.48 km) |
| Merzig to Mira | 972.29 mi (1,564.76 km) |
| Merzig to Miranda do Corvo | 974.05 mi (1,567.59 km) |
| Merzig to Mirandela | 863.61 mi (1,389.85 km) |
| Merzig to Mogadouro | 853.95 mi (1,374.31 km) |
| Merzig to Moimenta da Beira | 904.13 mi (1,455.06 km) |
| Merzig to Moita | 1,071.63 mi (1,724.63 km) |
| Merzig to Moncao | 885.83 mi (1,425.61 km) |
| Merzig to Montalegre | 870.60 mi (1,401.10 km) |
