| Sidmouth to Mangualde | 729.28 mi (1,173.66 km) |
| Sidmouth to Marco de Canavezes | 696.91 mi (1,121.57 km) |
| Sidmouth to Marinha Grande | 803.84 mi (1,293.65 km) |
| Sidmouth to Massama | 874.75 mi (1,407.78 km) |
| Sidmouth to Matosinhos | 706.20 mi (1,136.52 km) |
| Sidmouth to Mealhada | 754.34 mi (1,213.99 km) |
| Sidmouth to Melgaco | 637.95 mi (1,026.68 km) |
| Sidmouth to Melres | 708.66 mi (1,140.47 km) |
| Sidmouth to Mira | 755.70 mi (1,216.18 km) |
| Sidmouth to Miranda do Corvo | 771.20 mi (1,241.12 km) |
| Sidmouth to Mirandela | 662.55 mi (1,066.26 km) |
| Sidmouth to Mogadouro | 666.81 mi (1,073.13 km) |
| Sidmouth to Moimenta da Beira | 702.21 mi (1,130.10 km) |
| Sidmouth to Moita | 877.14 mi (1,411.62 km) |
| Sidmouth to Moncao | 644.60 mi (1,037.39 km) |
