| Opwijk to Marco de Canavezes | 895.59 mi (1,441.32 km) |
| Opwijk to Marinha Grande | 999.98 mi (1,609.31 km) |
| Opwijk to Massama | 1,067.04 mi (1,717.23 km) |
| Opwijk to Matosinhos | 912.96 mi (1,469.26 km) |
| Opwijk to Mealhada | 949.49 mi (1,528.06 km) |
| Opwijk to Melgaco | 848.66 mi (1,365.79 km) |
| Opwijk to Melres | 909.85 mi (1,464.27 km) |
| Opwijk to Mira | 955.40 mi (1,537.56 km) |
| Opwijk to Miranda do Corvo | 962.00 mi (1,548.18 km) |
| Opwijk to Mirandela | 849.05 mi (1,366.42 km) |
| Opwijk to Mogadouro | 843.85 mi (1,358.04 km) |
| Opwijk to Moimenta da Beira | 890.53 mi (1,433.16 km) |
| Opwijk to Moita | 1,064.65 mi (1,713.40 km) |
| Opwijk to Moncao | 857.97 mi (1,380.77 km) |
| Opwijk to Montalegre | 849.21 mi (1,366.66 km) |
