| Boulder to Bucak | 6,396.55 mi (10,294.26 km) |
| Boulder to Buharkent | 6,312.43 mi (10,158.88 km) |
| Boulder to Bulancak | 6,391.05 mi (10,285.40 km) |
| Boulder to Bulanik | 6,598.18 mi (10,618.75 km) |
| Boulder to Buldan | 6,310.28 mi (10,155.42 km) |
| Boulder to Bunyan | 6,459.24 mi (10,395.15 km) |
| Boulder to Burdur | 6,372.22 mi (10,255.10 km) |
| Boulder to Burhaniye | 6,170.31 mi (9,930.15 km) |
| Boulder to Bursa | 6,193.26 mi (9,967.09 km) |
| Boulder to Buyukcekmece | 6,131.35 mi (9,867.46 km) |
| Boulder to Buyukorhan | 6,214.42 mi (10,001.14 km) |
| Boulder to Buyukyoncali | 6,091.87 mi (9,803.93 km) |
| Boulder to Caglayancerit | 6,562.91 mi (10,561.99 km) |
| Boulder to Cal | 6,324.98 mi (10,179.07 km) |
| Boulder to Caldiran | 6,630.88 mi (10,671.37 km) |
