| Altamonte Springs to Mangualde | 4,146.18 mi (6,672.63 km) |
| Altamonte Springs to Marco de Canavezes | 4,117.21 mi (6,626.00 km) |
| Altamonte Springs to Marinha Grande | 4,099.78 mi (6,597.96 km) |
| Altamonte Springs to Massama | 4,098.18 mi (6,595.38 km) |
| Altamonte Springs to Matosinhos | 4,089.33 mi (6,581.13 km) |
| Altamonte Springs to Mealhada | 4,114.52 mi (6,621.68 km) |
| Altamonte Springs to Melgaco | 4,097.12 mi (6,593.68 km) |
| Altamonte Springs to Melres | 4,106.34 mi (6,608.51 km) |
| Altamonte Springs to Mira | 4,099.22 mi (6,597.06 km) |
| Altamonte Springs to Miranda do Corvo | 4,125.06 mi (6,638.64 km) |
| Altamonte Springs to Mirandela | 4,161.34 mi (6,697.03 km) |
| Altamonte Springs to Mogadouro | 4,187.23 mi (6,738.70 km) |
| Altamonte Springs to Moimenta da Beira | 4,147.62 mi (6,674.95 km) |
| Altamonte Springs to Moita | 4,115.21 mi (6,622.79 km) |
| Altamonte Springs to Moncao | 4,087.08 mi (6,577.52 km) |
