| Duncan to Badger (Alaska) | 2,914.81 mi (4,690.93 km) |
| Duncan to Bailey's Crossroads (Virginia) | 1,186.77 mi (1,909.92 km) |
| Duncan to Bainbridge (Georgia) | 814.79 mi (1,311.27 km) |
| Duncan to Bainbridge Island (Washington) | 1,558.48 mi (2,508.13 km) |
| Duncan to Baker (Louisiana) | 479.27 mi (771.30 km) |
| Duncan to Bakersfield (California) | 1,194.86 mi (1,922.94 km) |
| Duncan to Balch Springs (Texas) | 146.58 mi (235.89 km) |
| Duncan to Baldwin (New York) | 1,391.16 mi (2,238.85 km) |
| Duncan to Baldwin (Pennsylvania) | 1,061.46 mi (1,708.25 km) |
| Duncan to Baldwin Park (California) | 1,142.85 mi (1,839.24 km) |
| Duncan to Ballenger Creek (Maryland) | 1,177.22 mi (1,894.54 km) |
| Duncan to Ballwin (Missouri) | 495.51 mi (797.45 km) |
| Duncan to Baltimore (Maryland) | 1,218.83 mi (1,961.52 km) |
| Duncan to Bangor (Maine) | 1,692.22 mi (2,723.36 km) |
| Duncan to Banning (California) | 1,083.12 mi (1,743.12 km) |
