| Duncan to Beacon (New York) | 1,384.28 mi (2,227.78 km) |
| Duncan to Bear (Delaware) | 1,271.41 mi (2,046.14 km) |
| Duncan to Beatrice (Nebraska) | 401.31 mi (645.85 km) |
| Duncan to Beaufort (South Carolina) | 1,000.00 mi (1,609.35 km) |
| Duncan to Beaumont (California) | 1,087.87 mi (1,750.76 km) |
| Duncan to Beaumont (Texas) | 378.62 mi (609.33 km) |
| Duncan to Beaver Dam (Wisconsin) | 785.57 mi (1,264.26 km) |
| Duncan to Beavercreek (Ohio) | 842.16 mi (1,355.32 km) |
| Duncan to Beaverton (Oregon) | 1,509.64 mi (2,429.52 km) |
| Duncan to Beckley (West Virginia) | 958.76 mi (1,542.97 km) |
| Duncan to Bedford (Indiana) | 699.39 mi (1,125.56 km) |
| Duncan to Bedford (Ohio) | 1,007.94 mi (1,622.13 km) |
| Duncan to Bedford (Texas) | 125.50 mi (201.97 km) |
| Duncan to Bedford Heights (Ohio) | 1,009.74 mi (1,625.01 km) |
| Duncan to Beech Grove (Indiana) | 742.64 mi (1,195.16 km) |
