| Middleburg to Mangualde | 4,120.38 mi (6,631.11 km) |
| Middleburg to Marco de Canavezes | 4,090.45 mi (6,582.94 km) |
| Middleburg to Marinha Grande | 4,076.06 mi (6,559.78 km) |
| Middleburg to Massama | 4,076.51 mi (6,560.50 km) |
| Middleburg to Matosinhos | 4,062.76 mi (6,538.38 km) |
| Middleburg to Mealhada | 4,089.40 mi (6,581.26 km) |
| Middleburg to Melgaco | 4,068.62 mi (6,547.81 km) |
| Middleburg to Melres | 4,079.89 mi (6,565.95 km) |
| Middleburg to Mira | 4,074.11 mi (6,556.65 km) |
| Middleburg to Miranda do Corvo | 4,100.43 mi (6,599.01 km) |
| Middleburg to Mirandela | 4,133.66 mi (6,652.49 km) |
| Middleburg to Mogadouro | 4,159.67 mi (6,694.34 km) |
| Middleburg to Moimenta da Beira | 4,121.06 mi (6,632.20 km) |
| Middleburg to Moita | 4,093.63 mi (6,588.06 km) |
| Middleburg to Moncao | 4,058.73 mi (6,531.90 km) |
