| Great Bookham to Mangualde | 817.48 mi (1,315.61 km) |
| Great Bookham to Marco de Canavezes | 789.30 mi (1,270.26 km) |
| Great Bookham to Marinha Grande | 896.46 mi (1,442.72 km) |
| Great Bookham to Massama | 966.58 mi (1,555.56 km) |
| Great Bookham to Matosinhos | 801.86 mi (1,290.46 km) |
| Great Bookham to Mealhada | 846.05 mi (1,361.59 km) |
| Great Bookham to Melgaco | 734.28 mi (1,181.71 km) |
| Great Bookham to Melres | 802.18 mi (1,290.98 km) |
| Great Bookham to Mira | 849.19 mi (1,366.64 km) |
| Great Bookham to Miranda do Corvo | 861.41 mi (1,386.31 km) |
| Great Bookham to Mirandela | 749.63 mi (1,206.42 km) |
| Great Bookham to Mogadouro | 750.18 mi (1,207.29 km) |
| Great Bookham to Moimenta da Beira | 790.60 mi (1,272.34 km) |
| Great Bookham to Moita | 967.17 mi (1,556.51 km) |
| Great Bookham to Moncao | 742.06 mi (1,194.24 km) |
