| Glenmont to Mangualde | 3,577.62 mi (5,757.62 km) |
| Glenmont to Marco de Canavezes | 3,543.73 mi (5,703.08 km) |
| Glenmont to Marinha Grande | 3,543.04 mi (5,701.97 km) |
| Glenmont to Massama | 3,552.88 mi (5,717.80 km) |
| Glenmont to Matosinhos | 3,517.16 mi (5,660.32 km) |
| Glenmont to Mealhada | 3,549.95 mi (5,713.10 km) |
| Glenmont to Melgaco | 3,514.52 mi (5,656.08 km) |
| Glenmont to Melres | 3,534.64 mi (5,688.46 km) |
| Glenmont to Mira | 3,534.85 mi (5,688.79 km) |
| Glenmont to Miranda do Corvo | 3,563.11 mi (5,734.28 km) |
| Glenmont to Mirandela | 3,582.53 mi (5,765.52 km) |
| Glenmont to Mogadouro | 3,608.81 mi (5,807.81 km) |
| Glenmont to Moimenta da Beira | 3,574.90 mi (5,753.25 km) |
| Glenmont to Moita | 3,570.23 mi (5,745.73 km) |
| Glenmont to Moncao | 3,505.39 mi (5,641.39 km) |
