| Karlovo to Beyne-Heusay | 1,058.19 mi (1,702.99 km) |
| Karlovo to Bierbeek | 1,099.59 mi (1,769.61 km) |
| Karlovo to Bilzen | 1,070.60 mi (1,722.96 km) |
| Karlovo to Binche | 1,112.76 mi (1,790.82 km) |
| Karlovo to Bissegem | 1,161.92 mi (1,869.92 km) |
| Karlovo to Blankenberge | 1,178.12 mi (1,895.99 km) |
| Karlovo to Blegny | 1,056.27 mi (1,699.90 km) |
| Karlovo to Bocholt | 1,077.08 mi (1,733.40 km) |
| Karlovo to Boechout | 1,119.60 mi (1,801.82 km) |
| Karlovo to Bonheiden | 1,114.39 mi (1,793.43 km) |
| Karlovo to Boom | 1,122.40 mi (1,806.33 km) |
| Karlovo to Boortmeerbeek | 1,111.68 mi (1,789.08 km) |
| Karlovo to Borgerhout | 1,123.01 mi (1,807.31 km) |
| Karlovo to Borgloon | 1,075.66 mi (1,731.11 km) |
| Karlovo to Bornem | 1,128.17 mi (1,815.62 km) |
