| Gradignan to Beyne-Heusay | 497.56 mi (800.75 km) |
| Gradignan to Bierbeek | 487.30 mi (784.23 km) |
| Gradignan to Bilzen | 507.78 mi (817.19 km) |
| Gradignan to Binche | 447.94 mi (720.89 km) |
| Gradignan to Bissegem | 453.76 mi (730.26 km) |
| Gradignan to Blankenberge | 482.68 mi (776.80 km) |
| Gradignan to Blegny | 502.54 mi (808.75 km) |
| Gradignan to Bocholt | 526.49 mi (847.31 km) |
| Gradignan to Boechout | 499.53 mi (803.92 km) |
| Gradignan to Bonheiden | 493.68 mi (794.50 km) |
| Gradignan to Boom | 493.01 mi (793.43 km) |
| Gradignan to Boortmeerbeek | 491.46 mi (790.94 km) |
| Gradignan to Borgerhout | 502.31 mi (808.39 km) |
| Gradignan to Borgloon | 499.72 mi (804.23 km) |
| Gradignan to Bornem | 491.18 mi (790.47 km) |
