| Duncan to Beltsville (Maryland) | 1,199.81 mi (1,930.90 km) |
| Duncan to Belvedere Park (Georgia) | 782.53 mi (1,259.36 km) |
| Duncan to Belvidere (Illinois) | 723.39 mi (1,164.19 km) |
| Duncan to Bemidji (Minnesota) | 907.96 mi (1,461.23 km) |
| Duncan to Benbrook (Texas) | 131.32 mi (211.34 km) |
| Duncan to Bend (Oregon) | 1,405.85 mi (2,262.50 km) |
| Duncan to Benicia (California) | 1,367.01 mi (2,199.98 km) |
| Duncan to Bensenville (Illinois) | 744.48 mi (1,198.13 km) |
| Duncan to Bensville (Maryland) | 1,191.21 mi (1,917.07 km) |
| Duncan to Benton (Arkansas) | 304.41 mi (489.90 km) |
| Duncan to Bentonville (Arkansas) | 242.60 mi (390.43 km) |
| Duncan to Berea (Kentucky) | 789.14 mi (1,270.00 km) |
| Duncan to Berea (Ohio) | 991.68 mi (1,595.95 km) |
| Duncan to Berea (South Carolina) | 877.33 mi (1,411.93 km) |
| Duncan to Bergenfield (New Jersey) | 1,374.46 mi (2,211.97 km) |
