| Webster Groves to Blue Island (Illinois) | 254.87 mi (410.18 km) |
| Webster Groves to Blue Springs (Missouri) | 212.98 mi (342.76 km) |
| Webster Groves to Bluffdale (Utah) | 1,154.67 mi (1,858.25 km) |
| Webster Groves to Bluffton (Indiana) | 313.19 mi (504.03 km) |
| Webster Groves to Bluffton (South Carolina) | 688.90 mi (1,108.68 km) |
| Webster Groves to Blythe (California) | 1,392.81 mi (2,241.51 km) |
| Webster Groves to Blytheville (Arkansas) | 185.06 mi (297.83 km) |
| Webster Groves to Boca Raton (Florida) | 1,032.11 mi (1,661.03 km) |
| Webster Groves to Boerne (Texas) | 773.15 mi (1,244.27 km) |
| Webster Groves to Bogalusa (Louisiana) | 540.02 mi (869.08 km) |
| Webster Groves to Boiling Springs (South Carolina) | 523.68 mi (842.78 km) |
| Webster Groves to Boise (Idaho) | 1,385.03 mi (2,228.98 km) |
| Webster Groves to Bolingbrook (Illinois) | 245.20 mi (394.61 km) |
| Webster Groves to Bolivar (Missouri) | 179.80 mi (289.36 km) |
| Webster Groves to Bon Air (Virginia) | 698.82 mi (1,124.64 km) |
