| Castle Bromwich to Mangualde | 869.15 mi (1,398.77 km) |
| Castle Bromwich to Marco de Canavezes | 837.28 mi (1,347.47 km) |
| Castle Bromwich to Marinha Grande | 944.28 mi (1,519.68 km) |
| Castle Bromwich to Massama | 1,015.16 mi (1,633.75 km) |
| Castle Bromwich to Matosinhos | 846.81 mi (1,362.81 km) |
| Castle Bromwich to Mealhada | 894.67 mi (1,439.84 km) |
| Castle Bromwich to Melgaco | 778.57 mi (1,252.98 km) |
| Castle Bromwich to Melres | 849.13 mi (1,366.54 km) |
| Castle Bromwich to Mira | 896.20 mi (1,442.29 km) |
| Castle Bromwich to Miranda do Corvo | 911.38 mi (1,466.72 km) |
| Castle Bromwich to Mirandela | 802.16 mi (1,290.95 km) |
| Castle Bromwich to Mogadouro | 805.72 mi (1,296.69 km) |
| Castle Bromwich to Moimenta da Beira | 842.09 mi (1,355.21 km) |
| Castle Bromwich to Moita | 1,017.37 mi (1,637.30 km) |
| Castle Bromwich to Moncao | 785.26 mi (1,263.76 km) |
