| Duncan to Darby (Pennsylvania) | 1,296.77 mi (2,086.95 km) |
| Duncan to Dardenne Prairie (Missouri) | 493.38 mi (794.01 km) |
| Duncan to Darien (Illinois) | 733.54 mi (1,180.53 km) |
| Duncan to Davenport (Iowa) | 626.73 mi (1,008.62 km) |
| Duncan to Davidson (North Carolina) | 968.48 mi (1,558.61 km) |
| Duncan to Davie (Florida) | 1,200.81 mi (1,932.52 km) |
| Duncan to Davis (California) | 1,346.66 mi (2,167.25 km) |
| Duncan to Dayton (Nevada) | 1,236.15 mi (1,989.39 km) |
| Duncan to Dayton (Ohio) | 836.55 mi (1,346.30 km) |
| Duncan to Daytona Beach (Florida) | 1,052.22 mi (1,693.38 km) |
| Duncan to De Pere (Wisconsin) | 860.28 mi (1,384.49 km) |
| Duncan to De Witt (New York) | 1,309.01 mi (2,106.65 km) |
| Duncan to Dearborn (Michigan) | 958.14 mi (1,541.98 km) |
| Duncan to Dearborn Heights (Michigan) | 955.42 mi (1,537.60 km) |
| Duncan to DeBary (Florida) | 1,049.35 mi (1,688.76 km) |
