| Castro Daire to Bougival | 737.67 mi (1,187.17 km) |
| Castro Daire to Bouguenais | 534.78 mi (860.64 km) |
| Castro Daire to Boulogne-Billancourt | 739.54 mi (1,190.18 km) |
| Castro Daire to Boulogne-sur-Mer | 818.51 mi (1,317.27 km) |
| Castro Daire to Bourg-de-Peage | 714.89 mi (1,150.50 km) |
| Castro Daire to Bourg-en-Bresse | 752.81 mi (1,211.53 km) |
| Castro Daire to Bourg-la-Reine | 739.32 mi (1,189.82 km) |
| Castro Daire to Bourg-les-Valence | 705.71 mi (1,135.74 km) |
| Castro Daire to Bourges | 667.02 mi (1,073.47 km) |
| Castro Daire to Bourgoin-Jallieu | 738.15 mi (1,187.94 km) |
| Castro Daire to Bressuire | 552.62 mi (889.36 km) |
| Castro Daire to Brest | 544.34 mi (876.02 km) |
| Castro Daire to Bretigny-sur-Orge | 731.05 mi (1,176.50 km) |
| Castro Daire to Breuillet | 724.42 mi (1,165.84 km) |
| Castro Daire to Briancon | 786.00 mi (1,264.95 km) |
