| Karlovo to Mouscron | 1,159.89 mi (1,866.67 km) |
| Karlovo to Namur | 1,085.78 mi (1,747.40 km) |
| Karlovo to Neder-Over-Heembeek | 1,116.78 mi (1,797.28 km) |
| Karlovo to Neerpelt | 1,084.61 mi (1,745.52 km) |
| Karlovo to Nevele | 1,153.82 mi (1,856.89 km) |
| Karlovo to Niel | 1,124.64 mi (1,809.94 km) |
| Karlovo to Nieuwpoort | 1,188.26 mi (1,912.32 km) |
| Karlovo to Nijlen | 1,113.46 mi (1,791.94 km) |
| Karlovo to Ninove | 1,129.81 mi (1,818.25 km) |
| Karlovo to Nivelles | 1,111.20 mi (1,788.31 km) |
| Karlovo to Olen | 1,105.08 mi (1,778.46 km) |
| Karlovo to Oostakker | 1,146.84 mi (1,845.66 km) |
| Karlovo to Oosterzele | 1,141.58 mi (1,837.20 km) |
| Karlovo to Oostkamp | 1,169.60 mi (1,882.30 km) |
| Karlovo to Opglabbeek | 1,073.30 mi (1,727.31 km) |
