| Berkhampstead to Mangualde | 843.27 mi (1,357.12 km) |
| Berkhampstead to Marco de Canavezes | 814.11 mi (1,310.19 km) |
| Berkhampstead to Marinha Grande | 921.35 mi (1,482.77 km) |
| Berkhampstead to Massama | 991.73 mi (1,596.03 km) |
| Berkhampstead to Matosinhos | 825.89 mi (1,329.14 km) |
| Berkhampstead to Mealhada | 871.09 mi (1,401.89 km) |
| Berkhampstead to Melgaco | 758.04 mi (1,219.95 km) |
| Berkhampstead to Melres | 826.74 mi (1,330.50 km) |
| Berkhampstead to Mira | 873.82 mi (1,406.27 km) |
| Berkhampstead to Miranda do Corvo | 886.82 mi (1,427.19 km) |
| Berkhampstead to Mirandela | 775.56 mi (1,248.15 km) |
| Berkhampstead to Mogadouro | 776.87 mi (1,250.25 km) |
| Berkhampstead to Moimenta da Beira | 816.31 mi (1,313.73 km) |
| Berkhampstead to Moita | 992.73 mi (1,597.65 km) |
| Berkhampstead to Moncao | 765.55 mi (1,232.03 km) |
