| South San Francisco to Blue Island (Illinois) | 1,855.71 mi (2,986.48 km) |
| South San Francisco to Blue Springs (Missouri) | 1,522.35 mi (2,449.99 km) |
| South San Francisco to Bluffdale (Utah) | 594.66 mi (957.01 km) |
| South San Francisco to Bluffton (Indiana) | 1,990.75 mi (3,203.80 km) |
| South San Francisco to Bluffton (South Carolina) | 2,360.55 mi (3,798.93 km) |
| South San Francisco to Blythe (California) | 518.79 mi (834.92 km) |
| South San Francisco to Blytheville (Arkansas) | 1,793.97 mi (2,887.12 km) |
| South San Francisco to Boca Raton (Florida) | 2,574.32 mi (4,142.97 km) |
| South San Francisco to Boerne (Texas) | 1,460.88 mi (2,351.07 km) |
| South San Francisco to Bogalusa (Louisiana) | 1,909.29 mi (3,072.71 km) |
| South San Francisco to Boiling Springs (South Carolina) | 2,240.37 mi (3,605.52 km) |
| South San Francisco to Boise (Idaho) | 523.26 mi (842.10 km) |
| South San Francisco to Bolingbrook (Illinois) | 1,833.90 mi (2,951.38 km) |
| South San Francisco to Bolivar (Missouri) | 1,580.59 mi (2,543.71 km) |
| South San Francisco to Bon Air (Virginia) | 2,431.38 mi (3,912.92 km) |
