| Castelfidardo to Bougival | 660.11 mi (1,062.35 km) |
| Castelfidardo to Bouguenais | 778.73 mi (1,253.24 km) |
| Castelfidardo to Boulogne-Billancourt | 655.09 mi (1,054.26 km) |
| Castelfidardo to Boulogne-sur-Mer | 751.16 mi (1,208.88 km) |
| Castelfidardo to Bourg-de-Peage | 434.08 mi (698.58 km) |
| Castelfidardo to Bourg-en-Bresse | 449.08 mi (722.73 km) |
| Castelfidardo to Bourg-la-Reine | 650.24 mi (1,046.45 km) |
| Castelfidardo to Bourg-les-Valence | 440.31 mi (708.62 km) |
| Castelfidardo to Bourges | 596.32 mi (959.68 km) |
| Castelfidardo to Bourgoin-Jallieu | 432.82 mi (696.56 km) |
| Castelfidardo to Bressuire | 721.35 mi (1,160.90 km) |
| Castelfidardo to Brest | 928.45 mi (1,494.20 km) |
| Castelfidardo to Bretigny-sur-Orge | 644.84 mi (1,037.77 km) |
| Castelfidardo to Breuillet | 648.70 mi (1,043.98 km) |
| Castelfidardo to Briancon | 356.32 mi (573.44 km) |
