| Opava to Marco de Canavezes | 1,388.43 mi (2,234.47 km) |
| Opava to Marinha Grande | 1,479.93 mi (2,381.72 km) |
| Opava to Massama | 1,536.70 mi (2,473.08 km) |
| Opava to Matosinhos | 1,412.00 mi (2,272.40 km) |
| Opava to Mealhada | 1,433.27 mi (2,306.63 km) |
| Opava to Melgaco | 1,357.82 mi (2,185.21 km) |
| Opava to Melres | 1,403.72 mi (2,259.06 km) |
| Opava to Mira | 1,443.28 mi (2,322.73 km) |
| Opava to Miranda do Corvo | 1,439.99 mi (2,317.43 km) |
| Opava to Mirandela | 1,335.22 mi (2,148.83 km) |
| Opava to Mogadouro | 1,321.42 mi (2,126.61 km) |
| Opava to Moimenta da Beira | 1,373.62 mi (2,210.63 km) |
| Opava to Moita | 1,529.19 mi (2,461.00 km) |
| Opava to Moncao | 1,368.66 mi (2,202.65 km) |
| Opava to Montalegre | 1,348.35 mi (2,169.95 km) |
