| Castanet-Tolosan to Bougival | 370.87 mi (596.86 km) |
| Castanet-Tolosan to Bouguenais | 294.84 mi (474.49 km) |
| Castanet-Tolosan to Boulogne-Billancourt | 369.26 mi (594.26 km) |
| Castanet-Tolosan to Boulogne-sur-Mer | 498.25 mi (801.85 km) |
| Castanet-Tolosan to Bourg-de-Peage | 204.75 mi (329.52 km) |
| Castanet-Tolosan to Bourg-en-Bresse | 260.57 mi (419.35 km) |
| Castanet-Tolosan to Bourg-la-Reine | 365.80 mi (588.69 km) |
| Castanet-Tolosan to Bourg-les-Valence | 195.10 mi (313.99 km) |
| Castanet-Tolosan to Bourges | 250.41 mi (403.00 km) |
| Castanet-Tolosan to Bourgoin-Jallieu | 234.53 mi (377.43 km) |
| Castanet-Tolosan to Bressuire | 249.22 mi (401.08 km) |
| Castanet-Tolosan to Brest | 442.63 mi (712.34 km) |
| Castanet-Tolosan to Bretigny-sur-Orge | 354.20 mi (570.03 km) |
| Castanet-Tolosan to Breuillet | 350.44 mi (563.98 km) |
| Castanet-Tolosan to Briancon | 271.65 mi (437.18 km) |
