| Tielt to Marco de Canavezes | 871.01 mi (1,401.75 km) |
| Tielt to Marinha Grande | 976.10 mi (1,570.89 km) |
| Tielt to Massama | 1,043.80 mi (1,679.84 km) |
| Tielt to Matosinhos | 887.65 mi (1,428.53 km) |
| Tielt to Mealhada | 925.51 mi (1,489.46 km) |
| Tielt to Melgaco | 822.66 mi (1,323.95 km) |
| Tielt to Melres | 885.08 mi (1,424.41 km) |
| Tielt to Mira | 930.98 mi (1,498.27 km) |
| Tielt to Miranda do Corvo | 938.51 mi (1,510.38 km) |
| Tielt to Mirandela | 825.44 mi (1,328.41 km) |
| Tielt to Mogadouro | 821.15 mi (1,321.51 km) |
| Tielt to Moimenta da Beira | 866.95 mi (1,395.23 km) |
| Tielt to Moita | 1,041.91 mi (1,676.79 km) |
| Tielt to Moncao | 831.76 mi (1,338.58 km) |
| Tielt to Montalegre | 824.25 mi (1,326.50 km) |
