| Tonbridge to Mangualde | 826.60 mi (1,330.29 km) |
| Tonbridge to Marco de Canavezes | 799.61 mi (1,286.85 km) |
| Tonbridge to Marinha Grande | 906.58 mi (1,459.00 km) |
| Tonbridge to Massama | 976.34 mi (1,571.26 km) |
| Tonbridge to Matosinhos | 813.02 mi (1,308.42 km) |
| Tonbridge to Mealhada | 856.03 mi (1,377.65 km) |
| Tonbridge to Melgaco | 745.81 mi (1,200.27 km) |
| Tonbridge to Melres | 812.76 mi (1,308.01 km) |
| Tonbridge to Mira | 859.64 mi (1,383.46 km) |
| Tonbridge to Miranda do Corvo | 870.96 mi (1,401.67 km) |
| Tonbridge to Mirandela | 758.66 mi (1,220.95 km) |
| Tonbridge to Mogadouro | 758.25 mi (1,220.29 km) |
| Tonbridge to Moimenta da Beira | 799.84 mi (1,287.22 km) |
| Tonbridge to Moita | 976.44 mi (1,571.44 km) |
| Tonbridge to Moncao | 753.88 mi (1,213.25 km) |
