| Spanish Springs to Mangualde | 5,432.35 mi (8,742.52 km) |
| Spanish Springs to Marco de Canavezes | 5,390.18 mi (8,674.66 km) |
| Spanish Springs to Marinha Grande | 5,427.31 mi (8,734.41 km) |
| Spanish Springs to Massama | 5,460.43 mi (8,787.71 km) |
| Spanish Springs to Matosinhos | 5,369.19 mi (8,640.88 km) |
| Spanish Springs to Mealhada | 5,416.32 mi (8,716.73 km) |
| Spanish Springs to Melgaco | 5,341.93 mi (8,597.00 km) |
| Spanish Springs to Melres | 5,386.13 mi (8,668.14 km) |
| Spanish Springs to Mira | 5,403.04 mi (8,695.35 km) |
| Spanish Springs to Miranda do Corvo | 5,434.16 mi (8,745.44 km) |
| Spanish Springs to Mirandela | 5,412.54 mi (8,710.65 km) |
| Spanish Springs to Mogadouro | 5,437.24 mi (8,750.39 km) |
| Spanish Springs to Moimenta da Beira | 5,420.20 mi (8,722.96 km) |
| Spanish Springs to Moita | 5,476.97 mi (8,814.34 km) |
| Spanish Springs to Moncao | 5,335.92 mi (8,587.33 km) |
