| Tredegar to Mangualde | 801.31 mi (1,289.58 km) |
| Tredegar to Marco de Canavezes | 767.91 mi (1,235.83 km) |
| Tredegar to Marinha Grande | 874.48 mi (1,407.33 km) |
| Tredegar to Massama | 945.47 mi (1,521.59 km) |
| Tredegar to Matosinhos | 776.16 mi (1,249.11 km) |
| Tredegar to Mealhada | 825.37 mi (1,328.30 km) |
| Tredegar to Melgaco | 707.92 mi (1,139.29 km) |
| Tredegar to Melres | 779.28 mi (1,254.13 km) |
| Tredegar to Mira | 826.20 mi (1,329.64 km) |
| Tredegar to Miranda do Corvo | 842.60 mi (1,356.04 km) |
| Tredegar to Mirandela | 735.02 mi (1,182.89 km) |
| Tredegar to Mogadouro | 740.06 mi (1,191.02 km) |
| Tredegar to Moimenta da Beira | 774.27 mi (1,246.06 km) |
| Tredegar to Moita | 948.37 mi (1,526.26 km) |
| Tredegar to Moncao | 714.16 mi (1,149.33 km) |
