| Castricum to Blackburn | 307.42 mi (494.75 km) |
| Castricum to Blackpool | 331.06 mi (532.79 km) |
| Castricum to Blairgowrie | 424.77 mi (683.60 km) |
| Castricum to Blandford Forum | 314.92 mi (506.82 km) |
| Castricum to Blaydon | 309.40 mi (497.93 km) |
| Castricum to Bletchley | 231.41 mi (372.41 km) |
| Castricum to Bloxwich | 279.99 mi (450.60 km) |
| Castricum to Blunsdon Saint Andrew | 281.65 mi (453.27 km) |
| Castricum to Blyth | 308.33 mi (496.20 km) |
| Castricum to Bo'ness | 410.41 mi (660.49 km) |
| Castricum to Bodmin | 428.12 mi (688.99 km) |
| Castricum to Bognor Regis | 259.42 mi (417.49 km) |
| Castricum to Bolsover | 252.55 mi (406.44 km) |
| Castricum to Bolton | 302.91 mi (487.49 km) |
| Castricum to Bonhill | 441.15 mi (709.95 km) |
