| Duncan to Mangualde | 4,729.64 mi (7,611.62 km) |
| Duncan to Marco de Canavezes | 4,693.16 mi (7,552.91 km) |
| Duncan to Marinha Grande | 4,702.04 mi (7,567.20 km) |
| Duncan to Massama | 4,717.49 mi (7,592.07 km) |
| Duncan to Matosinhos | 4,667.71 mi (7,511.95 km) |
| Duncan to Mealhada | 4,704.60 mi (7,571.32 km) |
| Duncan to Melgaco | 4,658.45 mi (7,497.05 km) |
| Duncan to Melres | 4,685.28 mi (7,540.22 km) |
| Duncan to Mira | 4,689.77 mi (7,547.46 km) |
| Duncan to Miranda do Corvo | 4,719.09 mi (7,594.65 km) |
| Duncan to Mirandela | 4,728.11 mi (7,609.16 km) |
| Duncan to Mogadouro | 4,754.32 mi (7,651.34 km) |
| Duncan to Moimenta da Beira | 4,724.44 mi (7,603.25 km) |
| Duncan to Moita | 4,734.84 mi (7,619.99 km) |
| Duncan to Moncao | 4,650.04 mi (7,483.52 km) |
