| Portalegre to Mouscron | 942.29 mi (1,516.47 km) |
| Portalegre to Namur | 974.56 mi (1,568.41 km) |
| Portalegre to Neder-Over-Heembeek | 983.10 mi (1,582.15 km) |
| Portalegre to Neerpelt | 1,030.40 mi (1,658.27 km) |
| Portalegre to Nevele | 967.58 mi (1,557.17 km) |
| Portalegre to Niel | 993.23 mi (1,598.45 km) |
| Portalegre to Nieuwpoort | 951.70 mi (1,531.61 km) |
| Portalegre to Nijlen | 1,004.66 mi (1,616.85 km) |
| Portalegre to Ninove | 969.35 mi (1,560.02 km) |
| Portalegre to Nivelles | 964.55 mi (1,552.29 km) |
| Portalegre to Olen | 1,009.40 mi (1,624.47 km) |
| Portalegre to Oostakker | 976.98 mi (1,572.29 km) |
| Portalegre to Oosterzele | 969.72 mi (1,560.61 km) |
| Portalegre to Oostkamp | 966.08 mi (1,554.75 km) |
| Portalegre to Opglabbeek | 1,025.43 mi (1,650.26 km) |
