| Caerphilly to Bougival | 301.91 mi (485.88 km) |
| Caerphilly to Bouguenais | 312.39 mi (502.75 km) |
| Caerphilly to Boulogne-Billancourt | 306.76 mi (493.68 km) |
| Caerphilly to Boulogne-sur-Mer | 217.51 mi (350.04 km) |
| Caerphilly to Bourg-de-Peage | 589.65 mi (948.94 km) |
| Caerphilly to Bourg-en-Bresse | 533.24 mi (858.17 km) |
| Caerphilly to Bourg-la-Reine | 311.82 mi (501.83 km) |
| Caerphilly to Bourg-les-Valence | 590.15 mi (949.75 km) |
| Caerphilly to Bourges | 400.14 mi (643.96 km) |
| Caerphilly to Bourgoin-Jallieu | 566.77 mi (912.12 km) |
| Caerphilly to Bressuire | 349.72 mi (562.81 km) |
| Caerphilly to Brest | 227.39 mi (365.95 km) |
| Caerphilly to Bretigny-sur-Orge | 319.16 mi (513.64 km) |
| Caerphilly to Breuillet | 316.75 mi (509.76 km) |
| Caerphilly to Briancon | 646.04 mi (1,039.71 km) |
