| Boxley to Mangualde | 838.69 mi (1,349.74 km) |
| Boxley to Marco de Canavezes | 811.96 mi (1,306.73 km) |
| Boxley to Marinha Grande | 918.88 mi (1,478.79 km) |
| Boxley to Massama | 988.55 mi (1,590.92 km) |
| Boxley to Matosinhos | 825.54 mi (1,328.57 km) |
| Boxley to Mealhada | 868.31 mi (1,397.41 km) |
| Boxley to Melgaco | 758.41 mi (1,220.55 km) |
| Boxley to Melres | 825.16 mi (1,327.97 km) |
| Boxley to Mira | 872.02 mi (1,403.38 km) |
| Boxley to Miranda do Corvo | 883.14 mi (1,421.27 km) |
| Boxley to Mirandela | 770.75 mi (1,240.39 km) |
| Boxley to Mogadouro | 770.11 mi (1,239.37 km) |
| Boxley to Moimenta da Beira | 811.96 mi (1,306.73 km) |
| Boxley to Moita | 988.55 mi (1,590.92 km) |
| Boxley to Moncao | 766.53 mi (1,233.62 km) |
