| Castle Pines to Bougival | 4,886.57 mi (7,864.17 km) |
| Castle Pines to Bouguenais | 4,820.19 mi (7,757.34 km) |
| Castle Pines to Boulogne-Billancourt | 4,891.46 mi (7,872.04 km) |
| Castle Pines to Boulogne-sur-Mer | 4,788.76 mi (7,706.77 km) |
| Castle Pines to Bourg-de-Peage | 5,161.43 mi (8,306.52 km) |
| Castle Pines to Bourg-en-Bresse | 5,114.88 mi (8,231.60 km) |
| Castle Pines to Bourg-la-Reine | 4,896.50 mi (7,880.15 km) |
| Castle Pines to Bourg-les-Valence | 5,159.84 mi (8,303.97 km) |
| Castle Pines to Bourges | 4,973.01 mi (8,003.29 km) |
| Castle Pines to Bourgoin-Jallieu | 5,144.65 mi (8,279.51 km) |
| Castle Pines to Bressuire | 4,876.81 mi (7,848.46 km) |
| Castle Pines to Brest | 4,663.17 mi (7,504.65 km) |
| Castle Pines to Bretigny-sur-Orge | 4,903.43 mi (7,891.31 km) |
| Castle Pines to Breuillet | 4,900.59 mi (7,886.74 km) |
| Castle Pines to Briancon | 5,225.83 mi (8,410.16 km) |
