| Castricum to Bougival | 277.54 mi (446.66 km) |
| Castricum to Bouguenais | 464.63 mi (747.75 km) |
| Castricum to Boulogne-Billancourt | 277.72 mi (446.95 km) |
| Castricum to Boulogne-sur-Mer | 181.64 mi (292.32 km) |
| Castricum to Bourg-de-Peage | 519.33 mi (835.79 km) |
| Castricum to Bourg-en-Bresse | 439.08 mi (706.63 km) |
| Castricum to Bourg-la-Reine | 280.09 mi (450.76 km) |
| Castricum to Bourg-les-Valence | 525.38 mi (845.52 km) |
| Castricum to Bourges | 390.91 mi (629.11 km) |
| Castricum to Bourgoin-Jallieu | 481.94 mi (775.60 km) |
| Castricum to Bressuire | 456.60 mi (734.83 km) |
| Castricum to Brest | 494.14 mi (795.25 km) |
| Castricum to Bretigny-sur-Orge | 291.13 mi (468.54 km) |
| Castricum to Breuillet | 296.21 mi (476.70 km) |
| Castricum to Briancon | 536.35 mi (863.18 km) |
