| Spout Springs to Mangualde | 3,793.99 mi (6,105.83 km) |
| Spout Springs to Marco de Canavezes | 3,761.85 mi (6,054.12 km) |
| Spout Springs to Marinha Grande | 3,754.84 mi (6,042.84 km) |
| Spout Springs to Massama | 3,760.39 mi (6,051.76 km) |
| Spout Springs to Matosinhos | 3,734.71 mi (6,010.44 km) |
| Spout Springs to Mealhada | 3,764.74 mi (6,058.76 km) |
| Spout Springs to Melgaco | 3,736.00 mi (6,012.52 km) |
| Spout Springs to Melres | 3,752.07 mi (6,038.38 km) |
| Spout Springs to Mira | 3,749.52 mi (6,034.26 km) |
| Spout Springs to Miranda do Corvo | 3,776.94 mi (6,078.40 km) |
| Spout Springs to Mirandela | 3,802.77 mi (6,119.96 km) |
| Spout Springs to Mogadouro | 3,828.97 mi (6,162.13 km) |
| Spout Springs to Moimenta da Beira | 3,792.83 mi (6,103.97 km) |
| Spout Springs to Moita | 3,777.68 mi (6,079.58 km) |
| Spout Springs to Moncao | 3,726.51 mi (5,997.24 km) |
