| South Portland to Mouscron | 3,342.26 mi (5,378.85 km) |
| South Portland to Namur | 3,416.19 mi (5,497.82 km) |
| South Portland to Neder-Over-Heembeek | 3,385.13 mi (5,447.84 km) |
| South Portland to Neerpelt | 3,418.44 mi (5,501.45 km) |
| South Portland to Nevele | 3,348.06 mi (5,388.19 km) |
| South Portland to Niel | 3,377.45 mi (5,435.49 km) |
| South Portland to Nieuwpoort | 3,313.64 mi (5,332.79 km) |
| South Portland to Nijlen | 3,388.86 mi (5,453.84 km) |
| South Portland to Ninove | 3,372.08 mi (5,426.84 km) |
| South Portland to Nivelles | 3,390.79 mi (5,456.95 km) |
| South Portland to Olen | 3,397.32 mi (5,467.45 km) |
| South Portland to Oostakker | 3,355.09 mi (5,399.50 km) |
| South Portland to Oosterzele | 3,360.30 mi (5,407.88 km) |
| South Portland to Oostkamp | 3,332.29 mi (5,362.80 km) |
| South Portland to Opglabbeek | 3,429.34 mi (5,518.99 km) |
