| Harpenden to Blue Springs (Missouri) | 4,317.33 mi (6,948.07 km) |
| Harpenden to Bluffdale (Utah) | 4,856.69 mi (7,816.08 km) |
| Harpenden to Bluffton (Indiana) | 3,887.78 mi (6,256.78 km) |
| Harpenden to Bluffton (South Carolina) | 4,124.40 mi (6,637.58 km) |
| Harpenden to Blythe (California) | 5,325.34 mi (8,570.31 km) |
| Harpenden to Blytheville (Arkansas) | 4,303.00 mi (6,925.01 km) |
| Harpenden to Boca Raton (Florida) | 4,380.80 mi (7,050.22 km) |
| Harpenden to Boerne (Texas) | 4,961.03 mi (7,984.01 km) |
| Harpenden to Bogalusa (Louisiana) | 4,559.88 mi (7,338.42 km) |
| Harpenden to Boiling Springs (South Carolina) | 4,030.00 mi (6,485.66 km) |
| Harpenden to Boise (Idaho) | 4,816.83 mi (7,751.94 km) |
| Harpenden to Bolingbrook (Illinois) | 3,955.82 mi (6,366.28 km) |
| Harpenden to Bolivar (Missouri) | 4,355.15 mi (7,008.93 km) |
| Harpenden to Bon Air (Virginia) | 3,733.97 mi (6,009.24 km) |
| Harpenden to Bonham (Texas) | 4,664.68 mi (7,507.08 km) |
