| Otopeni to Mangualde | 1,730.03 mi (2,784.21 km) |
| Otopeni to Marco de Canavezes | 1,735.58 mi (2,793.14 km) |
| Otopeni to Marinha Grande | 1,809.09 mi (2,911.45 km) |
| Otopeni to Massama | 1,852.76 mi (2,981.73 km) |
| Otopeni to Matosinhos | 1,762.57 mi (2,836.58 km) |
| Otopeni to Mealhada | 1,769.28 mi (2,847.38 km) |
| Otopeni to Melgaco | 1,721.03 mi (2,769.73 km) |
| Otopeni to Melres | 1,750.52 mi (2,817.20 km) |
| Otopeni to Mira | 1,781.98 mi (2,867.82 km) |
| Otopeni to Miranda do Corvo | 1,770.60 mi (2,849.50 km) |
| Otopeni to Mirandela | 1,681.29 mi (2,705.78 km) |
| Otopeni to Mogadouro | 1,661.81 mi (2,674.43 km) |
| Otopeni to Moimenta da Beira | 1,713.91 mi (2,758.27 km) |
| Otopeni to Moita | 1,841.42 mi (2,963.47 km) |
| Otopeni to Moncao | 1,732.36 mi (2,787.97 km) |
