| Caerfyrddin to Beyne-Heusay | 439.18 mi (706.79 km) |
| Caerfyrddin to Bierbeek | 398.03 mi (640.57 km) |
| Caerfyrddin to Bilzen | 429.33 mi (690.95 km) |
| Caerfyrddin to Binche | 381.08 mi (613.29 km) |
| Caerfyrddin to Bissegem | 332.83 mi (535.63 km) |
| Caerfyrddin to Blankenberge | 321.30 mi (517.09 km) |
| Caerfyrddin to Blegny | 441.82 mi (711.04 km) |
| Caerfyrddin to Bocholt | 427.76 mi (688.42 km) |
| Caerfyrddin to Boechout | 381.34 mi (613.70 km) |
| Caerfyrddin to Bonheiden | 385.05 mi (619.68 km) |
| Caerfyrddin to Boom | 377.27 mi (607.15 km) |
| Caerfyrddin to Boortmeerbeek | 387.20 mi (623.14 km) |
| Caerfyrddin to Borgerhout | 378.75 mi (609.54 km) |
| Caerfyrddin to Borgloon | 423.00 mi (680.75 km) |
| Caerfyrddin to Bornem | 371.36 mi (597.65 km) |
