| Delaware to Blue Island (Illinois) | 258.33 mi (415.74 km) |
| Delaware to Blue Springs (Missouri) | 601.77 mi (968.45 km) |
| Delaware to Bluffdale (Utah) | 1,512.42 mi (2,434.01 km) |
| Delaware to Bluffton (Indiana) | 114.69 mi (184.57 km) |
| Delaware to Bluffton (South Carolina) | 570.27 mi (917.77 km) |
| Delaware to Blythe (California) | 1,791.16 mi (2,882.60 km) |
| Delaware to Blytheville (Arkansas) | 477.62 mi (768.66 km) |
| Delaware to Boca Raton (Florida) | 976.04 mi (1,570.79 km) |
| Delaware to Boerne (Texas) | 1,141.80 mi (1,837.55 km) |
| Delaware to Bogalusa (Louisiana) | 758.96 mi (1,221.42 km) |
| Delaware to Boiling Springs (South Carolina) | 366.98 mi (590.59 km) |
| Delaware to Boise (Idaho) | 1,707.82 mi (2,748.47 km) |
| Delaware to Bolingbrook (Illinois) | 279.57 mi (449.93 km) |
| Delaware to Bolivar (Missouri) | 585.41 mi (942.13 km) |
| Delaware to Bon Air (Virginia) | 352.14 mi (566.72 km) |
