| Bristol to Mangualde | 788.98 mi (1,269.74 km) |
| Bristol to Marco de Canavezes | 756.91 mi (1,218.13 km) |
| Bristol to Marinha Grande | 863.89 mi (1,390.30 km) |
| Bristol to Massama | 934.78 mi (1,504.38 km) |
| Bristol to Matosinhos | 766.37 mi (1,233.36 km) |
| Bristol to Mealhada | 814.32 mi (1,310.52 km) |
| Bristol to Melgaco | 698.13 mi (1,123.53 km) |
| Bristol to Melres | 768.73 mi (1,237.14 km) |
| Bristol to Mira | 815.79 mi (1,312.88 km) |
| Bristol to Miranda do Corvo | 831.08 mi (1,337.50 km) |
| Bristol to Mirandela | 722.10 mi (1,162.10 km) |
| Bristol to Mogadouro | 725.97 mi (1,168.34 km) |
| Bristol to Moimenta da Beira | 761.91 mi (1,226.18 km) |
| Bristol to Moita | 937.06 mi (1,508.05 km) |
| Bristol to Moncao | 704.82 mi (1,134.30 km) |
