| San Marino to Baraboo (Wisconsin) | 1,648.56 mi (2,653.10 km) |
| San Marino to Barberton (Ohio) | 2,039.55 mi (3,282.34 km) |
| San Marino to Bardstown (Kentucky) | 1,834.54 mi (2,952.41 km) |
| San Marino to Barrington (Illinois) | 1,710.92 mi (2,753.47 km) |
| San Marino to Barstow (California) | 79.54 mi (128.00 km) |
| San Marino to Bartlesville (Oklahoma) | 1,258.14 mi (2,024.78 km) |
| San Marino to Bartlett (Illinois) | 1,705.11 mi (2,744.10 km) |
| San Marino to Bartlett (Tennessee) | 1,604.05 mi (2,581.46 km) |
| San Marino to Bartow (Florida) | 2,180.21 mi (3,508.71 km) |
| San Marino to Batavia (Illinois) | 1,698.46 mi (2,733.41 km) |
| San Marino to Batavia (New York) | 2,220.08 mi (3,572.87 km) |
| San Marino to Batesville (Arkansas) | 1,500.05 mi (2,414.10 km) |
| San Marino to Baton Rouge (Louisiana) | 1,591.74 mi (2,561.66 km) |
| San Marino to Battle Creek (Michigan) | 1,859.22 mi (2,992.12 km) |
| San Marino to Battle Ground (Washington) | 838.33 mi (1,349.17 km) |
