| Highland Springs to Mangualde | 3,637.19 mi (5,853.49 km) |
| Highland Springs to Marco de Canavezes | 3,604.14 mi (5,800.30 km) |
| Highland Springs to Marinha Grande | 3,600.40 mi (5,794.29 km) |
| Highland Springs to Massama | 3,608.21 mi (5,806.85 km) |
| Highland Springs to Matosinhos | 3,577.28 mi (5,757.08 km) |
| Highland Springs to Mealhada | 3,608.75 mi (5,807.72 km) |
| Highland Springs to Melgaco | 3,576.56 mi (5,755.91 km) |
| Highland Springs to Melres | 3,594.71 mi (5,785.13 km) |
| Highland Springs to Mira | 3,593.58 mi (5,783.31 km) |
| Highland Springs to Miranda do Corvo | 3,621.46 mi (5,828.17 km) |
| Highland Springs to Mirandela | 3,643.98 mi (5,864.42 km) |
| Highland Springs to Mogadouro | 3,670.23 mi (5,906.67 km) |
| Highland Springs to Moimenta da Beira | 3,635.23 mi (5,850.33 km) |
| Highland Springs to Moita | 3,625.54 mi (5,834.74 km) |
| Highland Springs to Moncao | 3,567.24 mi (5,740.93 km) |
