| Castelo Branco to Bougival | 784.63 mi (1,262.75 km) |
| Castelo Branco to Bouguenais | 587.36 mi (945.26 km) |
| Castelo Branco to Boulogne-Billancourt | 786.11 mi (1,265.12 km) |
| Castelo Branco to Boulogne-sur-Mer | 872.92 mi (1,404.83 km) |
| Castelo Branco to Bourg-de-Peage | 733.53 mi (1,180.50 km) |
| Castelo Branco to Bourg-en-Bresse | 778.52 mi (1,252.90 km) |
| Castelo Branco to Bourg-la-Reine | 785.46 mi (1,264.08 km) |
| Castelo Branco to Bourg-les-Valence | 724.04 mi (1,165.23 km) |
| Castelo Branco to Bourges | 705.02 mi (1,134.62 km) |
| Castelo Branco to Bourgoin-Jallieu | 759.95 mi (1,223.01 km) |
| Castelo Branco to Bressuire | 599.18 mi (964.29 km) |
| Castelo Branco to Brest | 610.76 mi (982.92 km) |
| Castelo Branco to Bretigny-sur-Orge | 776.53 mi (1,249.70 km) |
| Castelo Branco to Breuillet | 770.09 mi (1,239.34 km) |
| Castelo Branco to Briancon | 801.01 mi (1,289.10 km) |
