| Severn to Mangualde | 3,558.66 mi (5,727.10 km) |
| Severn to Marco de Canavezes | 3,524.80 mi (5,672.62 km) |
| Severn to Marinha Grande | 3,523.98 mi (5,671.30 km) |
| Severn to Massama | 3,533.75 mi (5,687.01 km) |
| Severn to Matosinhos | 3,498.22 mi (5,629.84 km) |
| Severn to Mealhada | 3,530.96 mi (5,682.52 km) |
| Severn to Melgaco | 3,495.68 mi (5,625.75 km) |
| Severn to Melres | 3,515.70 mi (5,657.98 km) |
| Severn to Mira | 3,515.85 mi (5,658.21 km) |
| Severn to Miranda do Corvo | 3,544.10 mi (5,703.67 km) |
| Severn to Mirandela | 3,563.66 mi (5,735.15 km) |
| Severn to Mogadouro | 3,589.93 mi (5,777.44 km) |
| Severn to Moimenta da Beira | 3,555.97 mi (5,722.78 km) |
| Severn to Moita | 3,551.10 mi (5,714.94 km) |
| Severn to Moncao | 3,486.54 mi (5,611.04 km) |
