| San Marino to Bonham (Texas) | 1,256.04 mi (2,021.40 km) |
| San Marino to Bonita (California) | 118.51 mi (190.73 km) |
| San Marino to Bonita Springs (Florida) | 2,221.36 mi (3,574.93 km) |
| San Marino to Bonney Lake (Washington) | 926.51 mi (1,491.08 km) |
| San Marino to Boone (Iowa) | 1,421.10 mi (2,287.03 km) |
| San Marino to Boone (North Carolina) | 2,051.56 mi (3,301.66 km) |
| San Marino to Borger (Texas) | 951.89 mi (1,531.92 km) |
| San Marino to Bossier City (Louisiana) | 1,412.34 mi (2,272.95 km) |
| San Marino to Boston (Massachusetts) | 2,580.84 mi (4,153.46 km) |
| San Marino to Bostonia (California) | 112.34 mi (180.80 km) |
| San Marino to Bothell (Washington) | 966.69 mi (1,555.74 km) |
| San Marino to Bothell East (Washington) | 968.67 mi (1,558.93 km) |
| San Marino to Bothell West (Washington) | 969.25 mi (1,559.86 km) |
| San Marino to Boulder (Colorado) | 816.69 mi (1,314.34 km) |
| San Marino to Boulder City (Nevada) | 215.98 mi (347.59 km) |
