| Irving to Mangualde | 4,752.37 mi (7,648.19 km) |
| Irving to Marco de Canavezes | 4,716.81 mi (7,590.97 km) |
| Irving to Marinha Grande | 4,722.00 mi (7,599.32 km) |
| Irving to Massama | 4,735.05 mi (7,620.32 km) |
| Irving to Matosinhos | 4,690.92 mi (7,549.30 km) |
| Irving to Mealhada | 4,726.30 mi (7,606.25 km) |
| Irving to Melgaco | 4,684.00 mi (7,538.16 km) |
| Irving to Melres | 4,708.47 mi (7,577.56 km) |
| Irving to Mira | 4,711.35 mi (7,582.19 km) |
| Irving to Miranda do Corvo | 4,740.28 mi (7,628.75 km) |
| Irving to Mirandela | 4,753.16 mi (7,649.48 km) |
| Irving to Mogadouro | 4,779.43 mi (7,691.75 km) |
| Irving to Moimenta da Beira | 4,748.08 mi (7,641.29 km) |
| Irving to Moita | 4,752.41 mi (7,648.27 km) |
| Irving to Moncao | 4,675.33 mi (7,524.22 km) |
