| Borehamwood to Mangualde | 842.66 mi (1,356.13 km) |
| Borehamwood to Marco de Canavezes | 814.09 mi (1,310.15 km) |
| Borehamwood to Marinha Grande | 921.29 mi (1,482.68 km) |
| Borehamwood to Massama | 991.52 mi (1,595.69 km) |
| Borehamwood to Matosinhos | 826.32 mi (1,329.84 km) |
| Borehamwood to Mealhada | 870.94 mi (1,401.64 km) |
| Borehamwood to Melgaco | 758.62 mi (1,220.88 km) |
| Borehamwood to Melres | 826.86 mi (1,330.71 km) |
| Borehamwood to Mira | 873.91 mi (1,406.42 km) |
| Borehamwood to Miranda do Corvo | 886.44 mi (1,426.60 km) |
| Borehamwood to Mirandela | 774.86 mi (1,247.01 km) |
| Borehamwood to Mogadouro | 775.68 mi (1,248.33 km) |
| Borehamwood to Moimenta da Beira | 815.74 mi (1,312.81 km) |
| Borehamwood to Moita | 992.27 mi (1,596.91 km) |
| Borehamwood to Moncao | 766.28 mi (1,233.21 km) |
