| Horten to Marco de Canavezes | 1,492.10 mi (2,401.30 km) |
| Horten to Marinha Grande | 1,599.18 mi (2,573.63 km) |
| Horten to Massama | 1,669.07 mi (2,686.11 km) |
| Horten to Matosinhos | 1,504.82 mi (2,421.78 km) |
| Horten to Mealhada | 1,548.68 mi (2,492.37 km) |
| Horten to Melgaco | 1,437.21 mi (2,312.96 km) |
| Horten to Melres | 1,505.07 mi (2,422.18 km) |
| Horten to Mira | 1,552.05 mi (2,497.78 km) |
| Horten to Miranda do Corvo | 1,563.73 mi (2,516.58 km) |
| Horten to Mirandela | 1,451.46 mi (2,335.89 km) |
| Horten to Mogadouro | 1,450.75 mi (2,334.75 km) |
| Horten to Moimenta da Beira | 1,492.64 mi (2,402.17 km) |
| Horten to Moita | 1,669.24 mi (2,686.38 km) |
| Horten to Moncao | 1,444.91 mi (2,325.35 km) |
| Horten to Montalegre | 1,444.25 mi (2,324.30 km) |
