| Unterwellenborn to Marco de Canavezes | 1,141.23 mi (1,836.63 km) |
| Unterwellenborn to Marinha Grande | 1,238.82 mi (1,993.69 km) |
| Unterwellenborn to Massama | 1,300.32 mi (2,092.66 km) |
| Unterwellenborn to Matosinhos | 1,162.70 mi (1,871.19 km) |
| Unterwellenborn to Mealhada | 1,190.11 mi (1,915.29 km) |
| Unterwellenborn to Melgaco | 1,104.07 mi (1,776.83 km) |
| Unterwellenborn to Melres | 1,156.31 mi (1,860.89 km) |
| Unterwellenborn to Mira | 1,198.64 mi (1,929.03 km) |
| Unterwellenborn to Miranda do Corvo | 1,199.16 mi (1,929.86 km) |
| Unterwellenborn to Mirandela | 1,089.85 mi (1,753.94 km) |
| Unterwellenborn to Mogadouro | 1,079.11 mi (1,736.65 km) |
| Unterwellenborn to Moimenta da Beira | 1,129.95 mi (1,818.49 km) |
| Unterwellenborn to Moita | 1,294.77 mi (2,083.73 km) |
| Unterwellenborn to Moncao | 1,114.46 mi (1,793.55 km) |
| Unterwellenborn to Montalegre | 1,098.25 mi (1,767.46 km) |
