| Barth to Marco de Canavezes | 1,320.43 mi (2,125.03 km) |
| Barth to Marinha Grande | 1,423.58 mi (2,291.03 km) |
| Barth to Massama | 1,489.36 mi (2,396.90 km) |
| Barth to Matosinhos | 1,338.67 mi (2,154.38 km) |
| Barth to Mealhada | 1,373.36 mi (2,210.20 km) |
| Barth to Melgaco | 1,275.12 mi (2,052.11 km) |
| Barth to Melres | 1,334.91 mi (2,148.34 km) |
| Barth to Mira | 1,379.91 mi (2,220.75 km) |
| Barth to Miranda do Corvo | 1,385.01 mi (2,228.96 km) |
| Barth to Mirandela | 1,272.55 mi (2,047.98 km) |
| Barth to Mogadouro | 1,265.78 mi (2,037.08 km) |
| Barth to Moimenta da Beira | 1,313.85 mi (2,114.44 km) |
| Barth to Moita | 1,486.03 mi (2,391.54 km) |
| Barth to Moncao | 1,284.59 mi (2,067.35 km) |
| Barth to Montalegre | 1,274.59 mi (2,051.25 km) |
