| Opglabbeek to Marco de Canavezes | 944.33 mi (1,519.76 km) |
| Opglabbeek to Marinha Grande | 1,047.68 mi (1,686.08 km) |
| Opglabbeek to Massama | 1,113.82 mi (1,792.52 km) |
| Opglabbeek to Matosinhos | 962.58 mi (1,549.12 km) |
| Opglabbeek to Mealhada | 997.39 mi (1,605.15 km) |
| Opglabbeek to Melgaco | 899.23 mi (1,447.18 km) |
| Opglabbeek to Melres | 958.80 mi (1,543.05 km) |
| Opglabbeek to Mira | 1,003.85 mi (1,615.53 km) |
| Opglabbeek to Miranda do Corvo | 1,009.24 mi (1,624.22 km) |
| Opglabbeek to Mirandela | 896.64 mi (1,443.01 km) |
| Opglabbeek to Mogadouro | 890.28 mi (1,432.76 km) |
| Opglabbeek to Moimenta da Beira | 937.99 mi (1,509.55 km) |
| Opglabbeek to Moita | 1,110.80 mi (1,787.67 km) |
| Opglabbeek to Moncao | 908.78 mi (1,462.55 km) |
| Opglabbeek to Montalegre | 898.48 mi (1,445.97 km) |
