| Royal Tunbridge Wells to Mangualde | 822.35 mi (1,323.44 km) |
| Royal Tunbridge Wells to Marco de Canavezes | 795.45 mi (1,280.15 km) |
| Royal Tunbridge Wells to Marinha Grande | 902.40 mi (1,452.27 km) |
| Royal Tunbridge Wells to Massama | 972.12 mi (1,564.48 km) |
| Royal Tunbridge Wells to Matosinhos | 808.92 mi (1,301.83 km) |
| Royal Tunbridge Wells to Mealhada | 851.84 mi (1,370.90 km) |
| Royal Tunbridge Wells to Melgaco | 741.75 mi (1,193.72 km) |
| Royal Tunbridge Wells to Melres | 808.61 mi (1,301.34 km) |
| Royal Tunbridge Wells to Mira | 855.49 mi (1,376.77 km) |
| Royal Tunbridge Wells to Miranda do Corvo | 866.73 mi (1,394.87 km) |
| Royal Tunbridge Wells to Mirandela | 754.41 mi (1,214.10 km) |
| Royal Tunbridge Wells to Mogadouro | 753.93 mi (1,213.33 km) |
| Royal Tunbridge Wells to Moimenta da Beira | 795.60 mi (1,280.39 km) |
| Royal Tunbridge Wells to Moita | 972.20 mi (1,564.60 km) |
| Royal Tunbridge Wells to Moncao | 749.84 mi (1,206.75 km) |
