| Caerphilly to Beyne-Heusay | 390.22 mi (628.00 km) |
| Caerphilly to Bierbeek | 349.28 mi (562.10 km) |
| Caerphilly to Bilzen | 380.93 mi (613.04 km) |
| Caerphilly to Binche | 331.17 mi (532.96 km) |
| Caerphilly to Bissegem | 283.42 mi (456.13 km) |
| Caerphilly to Blankenberge | 273.42 mi (440.03 km) |
| Caerphilly to Blegny | 393.01 mi (632.48 km) |
| Caerphilly to Bocholt | 380.23 mi (611.92 km) |
| Caerphilly to Boechout | 333.39 mi (536.54 km) |
| Caerphilly to Bonheiden | 336.76 mi (541.97 km) |
| Caerphilly to Boom | 329.07 mi (529.59 km) |
| Caerphilly to Boortmeerbeek | 338.78 mi (545.21 km) |
| Caerphilly to Borgerhout | 330.99 mi (532.67 km) |
| Caerphilly to Borgloon | 374.37 mi (602.48 km) |
| Caerphilly to Bornem | 323.17 mi (520.09 km) |
