| Central Islip to Mangualde | 3,343.05 mi (5,380.12 km) |
| Central Islip to Marco de Canavezes | 3,308.92 mi (5,325.20 km) |
| Central Islip to Marinha Grande | 3,309.20 mi (5,325.65 km) |
| Central Islip to Massama | 3,319.84 mi (5,342.76 km) |
| Central Islip to Matosinhos | 3,282.44 mi (5,282.57 km) |
| Central Islip to Mealhada | 3,315.63 mi (5,335.99 km) |
| Central Islip to Melgaco | 3,279.32 mi (5,277.55 km) |
| Central Islip to Melres | 3,299.94 mi (5,310.74 km) |
| Central Islip to Mira | 3,300.55 mi (5,311.72 km) |
| Central Islip to Miranda do Corvo | 3,328.93 mi (5,357.40 km) |
| Central Islip to Mirandela | 3,347.45 mi (5,387.20 km) |
| Central Islip to Mogadouro | 3,373.73 mi (5,429.50 km) |
| Central Islip to Moimenta da Beira | 3,340.12 mi (5,375.40 km) |
| Central Islip to Moita | 3,337.20 mi (5,370.70 km) |
| Central Islip to Moncao | 3,270.23 mi (5,262.93 km) |
