| San Marino to Bound Brook (New Jersey) | 2,409.55 mi (3,877.80 km) |
| San Marino to Bountiful (Utah) | 578.27 mi (930.64 km) |
| San Marino to Bourbonnais (Illinois) | 1,714.59 mi (2,759.36 km) |
| San Marino to Bowie (Maryland) | 2,301.01 mi (3,703.11 km) |
| San Marino to Bowling Green (Kentucky) | 1,783.32 mi (2,869.97 km) |
| San Marino to Bowling Green (Ohio) | 1,934.46 mi (3,113.21 km) |
| San Marino to Box Elder (South Dakota) | 1,057.96 mi (1,702.62 km) |
| San Marino to Boynton Beach (Florida) | 2,314.12 mi (3,724.21 km) |
| San Marino to Bozeman (Montana) | 881.15 mi (1,418.08 km) |
| San Marino to Bradenton (Florida) | 2,146.86 mi (3,455.03 km) |
| San Marino to Bradfordville (Florida) | 1,985.26 mi (3,194.96 km) |
| San Marino to Bradley (Illinois) | 1,716.15 mi (2,761.88 km) |
| San Marino to Bradley Gardens (New Jersey) | 2,402.76 mi (3,866.86 km) |
| San Marino to Brainerd (Minnesota) | 1,508.83 mi (2,428.23 km) |
| San Marino to Brambleton (Virginia) | 2,258.47 mi (3,634.66 km) |
