| Castricum to Bingol | 1,941.73 mi (3,124.91 km) |
| Castricum to Birecik | 1,927.78 mi (3,102.46 km) |
| Castricum to Bitlis | 2,029.20 mi (3,265.68 km) |
| Castricum to Bodrum | 1,534.75 mi (2,469.94 km) |
| Castricum to Bogazliyan | 1,716.98 mi (2,763.22 km) |
| Castricum to Bolu | 1,502.78 mi (2,418.50 km) |
| Castricum to Bolvadin | 1,578.24 mi (2,539.93 km) |
| Castricum to Bor | 1,753.12 mi (2,821.38 km) |
| Castricum to Borcka | 1,882.56 mi (3,029.69 km) |
| Castricum to Boyabat | 1,595.44 mi (2,567.61 km) |
| Castricum to Bozdogan | 1,531.70 mi (2,465.04 km) |
| Castricum to Bozkir | 1,699.74 mi (2,735.46 km) |
| Castricum to Bozkurt | 1,570.95 mi (2,528.20 km) |
| Castricum to Bozuyuk | 1,481.67 mi (2,384.51 km) |
| Castricum to Bucak | 1,625.00 mi (2,615.19 km) |
