| Duncan to Buena Park (California) | 1,146.76 mi (1,845.54 km) |
| Duncan to Buenaventura Lakes (Florida) | 1,064.87 mi (1,713.74 km) |
| Duncan to Buffalo (Minnesota) | 765.63 mi (1,232.16 km) |
| Duncan to Buffalo (New York) | 1,175.36 mi (1,891.56 km) |
| Duncan to Buffalo Grove (Illinois) | 753.25 mi (1,212.24 km) |
| Duncan to Buford (Georgia) | 794.78 mi (1,279.08 km) |
| Duncan to Bull Run (Virginia) | 1,165.33 mi (1,875.41 km) |
| Duncan to Bullhead City (Arizona) | 942.62 mi (1,517.00 km) |
| Duncan to Burbank (California) | 1,161.89 mi (1,869.88 km) |
| Duncan to Burbank (Illinois) | 742.07 mi (1,194.24 km) |
| Duncan to Burien (Washington) | 1,544.80 mi (2,486.11 km) |
| Duncan to Burkburnett (Texas) | 48.94 mi (78.77 km) |
| Duncan to Burke (Virginia) | 1,179.01 mi (1,897.43 km) |
| Duncan to Burke Centre (Virginia) | 1,177.18 mi (1,894.49 km) |
| Duncan to Burleson (Texas) | 143.86 mi (231.52 km) |
