| Swanage to Mangualde | 745.33 mi (1,199.49 km) |
| Swanage to Marco de Canavezes | 715.37 mi (1,151.28 km) |
| Swanage to Marinha Grande | 822.62 mi (1,323.87 km) |
| Swanage to Massama | 893.16 mi (1,437.39 km) |
| Swanage to Matosinhos | 726.65 mi (1,169.44 km) |
| Swanage to Mealhada | 772.50 mi (1,243.21 km) |
| Swanage to Melgaco | 658.69 mi (1,060.06 km) |
| Swanage to Melres | 727.82 mi (1,171.31 km) |
| Swanage to Mira | 774.92 mi (1,247.12 km) |
| Swanage to Miranda do Corvo | 788.50 mi (1,268.97 km) |
| Swanage to Mirandela | 677.81 mi (1,090.82 km) |
| Swanage to Mogadouro | 679.95 mi (1,094.27 km) |
| Swanage to Moimenta da Beira | 718.32 mi (1,156.02 km) |
| Swanage to Moita | 894.50 mi (1,439.55 km) |
| Swanage to Moncao | 666.06 mi (1,071.92 km) |
