| San Marino to Bixby (Oklahoma) | 1,261.51 mi (2,030.21 km) |
| San Marino to Black Forest (Colorado) | 818.74 mi (1,317.64 km) |
| San Marino to Blackfoot (Idaho) | 699.34 mi (1,125.48 km) |
| San Marino to Blackhawk (California) | 331.80 mi (533.97 km) |
| San Marino to Blacksburg (Virginia) | 2,112.09 mi (3,399.08 km) |
| San Marino to Blackwells Mills (New Jersey) | 2,406.85 mi (3,873.44 km) |
| San Marino to Blaine (Minnesota) | 1,519.95 mi (2,446.12 km) |
| San Marino to Bloomingdale (Florida) | 2,155.20 mi (3,468.46 km) |
| San Marino to Bloomingdale (Illinois) | 1,710.76 mi (2,753.21 km) |
| San Marino to Bloomington (California) | 40.96 mi (65.92 km) |
| San Marino to Bloomington (Illinois) | 1,652.44 mi (2,659.34 km) |
| San Marino to Bloomington (Indiana) | 1,776.09 mi (2,858.34 km) |
| San Marino to Bloomington (Minnesota) | 1,506.61 mi (2,424.66 km) |
| San Marino to Bloomsburg (Pennsylvania) | 2,307.91 mi (3,714.22 km) |
| San Marino to Blue Ash (Ohio) | 1,890.89 mi (3,043.09 km) |
