| Otopeni to Montalegre | 1,703.92 mi (2,742.19 km) |
| Otopeni to Montemor-o-Novo | 1,803.67 mi (2,902.73 km) |
| Otopeni to Montemor-o-Velho | 1,786.14 mi (2,874.51 km) |
| Otopeni to Montijo | 1,836.37 mi (2,955.36 km) |
| Otopeni to Mortagua | 1,757.40 mi (2,828.26 km) |
| Otopeni to Moura | 1,780.84 mi (2,865.99 km) |
| Otopeni to Murtosa | 1,769.81 mi (2,848.23 km) |
| Otopeni to Nazare | 1,819.58 mi (2,928.33 km) |
| Otopeni to Nelas | 1,736.51 mi (2,794.65 km) |
| Otopeni to Obidos | 1,830.50 mi (2,945.90 km) |
| Otopeni to Odemira | 1,855.48 mi (2,986.10 km) |
| Otopeni to Odivelas | 1,847.14 mi (2,972.69 km) |
| Otopeni to Oeiras | 1,856.89 mi (2,988.38 km) |
| Otopeni to Olhao | 1,833.80 mi (2,951.21 km) |
| Otopeni to Oliveira de Azemeis | 1,759.50 mi (2,831.64 km) |
