| Castelnaudary to Bougival | 383.36 mi (616.95 km) |
| Castelnaudary to Bouguenais | 318.28 mi (512.23 km) |
| Castelnaudary to Boulogne-Billancourt | 381.44 mi (613.87 km) |
| Castelnaudary to Boulogne-sur-Mer | 512.11 mi (824.16 km) |
| Castelnaudary to Bourg-de-Peage | 194.03 mi (312.25 km) |
| Castelnaudary to Bourg-en-Bresse | 256.11 mi (412.17 km) |
| Castelnaudary to Bourg-la-Reine | 377.75 mi (607.93 km) |
| Castelnaudary to Bourg-les-Valence | 184.24 mi (296.50 km) |
| Castelnaudary to Bourges | 261.12 mi (420.22 km) |
| Castelnaudary to Bourgoin-Jallieu | 226.60 mi (364.68 km) |
| Castelnaudary to Bressuire | 270.92 mi (436.00 km) |
| Castelnaudary to Brest | 467.60 mi (752.53 km) |
| Castelnaudary to Bretigny-sur-Orge | 366.12 mi (589.21 km) |
| Castelnaudary to Breuillet | 362.75 mi (583.79 km) |
| Castelnaudary to Briancon | 256.50 mi (412.79 km) |
