| Houten to Marco de Canavezes | 977.43 mi (1,573.02 km) |
| Houten to Marinha Grande | 1,082.34 mi (1,741.86 km) |
| Houten to Massama | 1,149.83 mi (1,850.47 km) |
| Houten to Matosinhos | 994.21 mi (1,600.02 km) |
| Houten to Mealhada | 1,031.77 mi (1,660.48 km) |
| Houten to Melgaco | 929.29 mi (1,495.55 km) |
| Houten to Melres | 991.55 mi (1,595.74 km) |
| Houten to Mira | 1,037.36 mi (1,669.48 km) |
| Houten to Miranda do Corvo | 1,044.61 mi (1,681.14 km) |
| Houten to Mirandela | 931.57 mi (1,499.22 km) |
| Houten to Mogadouro | 926.93 mi (1,491.75 km) |
| Houten to Moimenta da Beira | 973.08 mi (1,566.02 km) |
| Houten to Moita | 1,147.74 mi (1,847.10 km) |
| Houten to Moncao | 938.39 mi (1,510.19 km) |
| Houten to Montalegre | 930.74 mi (1,497.89 km) |
