| North Chicago to Mangualde | 3,985.07 mi (6,413.36 km) |
| North Chicago to Marco de Canavezes | 3,947.38 mi (6,352.70 km) |
| North Chicago to Marinha Grande | 3,961.65 mi (6,375.66 km) |
| North Chicago to Massama | 3,980.94 mi (6,406.70 km) |
| North Chicago to Matosinhos | 3,922.58 mi (6,312.78 km) |
| North Chicago to Mealhada | 3,961.57 mi (6,375.52 km) |
| North Chicago to Melgaco | 3,910.20 mi (6,292.86 km) |
| North Chicago to Melres | 3,940.13 mi (6,341.03 km) |
| North Chicago to Mira | 3,946.95 mi (6,352.00 km) |
| North Chicago to Miranda do Corvo | 3,976.78 mi (6,400.01 km) |
| North Chicago to Mirandela | 3,980.38 mi (6,405.80 km) |
| North Chicago to Mogadouro | 4,006.48 mi (6,447.81 km) |
| North Chicago to Moimenta da Beira | 3,978.60 mi (6,402.95 km) |
| North Chicago to Moita | 3,998.21 mi (6,434.50 km) |
| North Chicago to Moncao | 3,902.14 mi (6,279.89 km) |
