| Seymour to Mangualde | 4,004.37 mi (6,444.41 km) |
| Seymour to Marco de Canavezes | 3,968.63 mi (6,386.90 km) |
| Seymour to Marinha Grande | 3,974.77 mi (6,396.77 km) |
| Seymour to Massama | 3,988.80 mi (6,419.35 km) |
| Seymour to Matosinhos | 3,942.82 mi (6,345.35 km) |
| Seymour to Mealhada | 3,978.54 mi (6,402.84 km) |
| Seymour to Melgaco | 3,935.61 mi (6,333.75 km) |
| Seymour to Melres | 3,960.38 mi (6,373.61 km) |
| Seymour to Mira | 3,963.62 mi (6,378.83 km) |
| Seymour to Miranda do Corvo | 3,992.66 mi (6,425.57 km) |
| Seymour to Mirandela | 4,004.82 mi (6,445.13 km) |
| Seymour to Mogadouro | 4,031.08 mi (6,487.39 km) |
| Seymour to Moimenta da Beira | 3,999.91 mi (6,437.23 km) |
| Seymour to Moita | 4,006.16 mi (6,447.28 km) |
| Seymour to Moncao | 3,926.96 mi (6,319.84 km) |
