| Duncan to Dixon (California) | 1,350.84 mi (2,173.97 km) |
| Duncan to Dixon (Illinois) | 681.04 mi (1,096.03 km) |
| Duncan to Dobbs Ferry (New York) | 1,382.21 mi (2,224.46 km) |
| Duncan to Doctor Phillips (Florida) | 1,053.85 mi (1,696.01 km) |
| Duncan to Dodge City (Kansas) | 251.36 mi (404.52 km) |
| Duncan to Dolton (Illinois) | 744.01 mi (1,197.37 km) |
| Duncan to Donna (Texas) | 580.02 mi (933.46 km) |
| Duncan to Dorado (Puerto Rico) | 2,235.85 mi (3,598.26 km) |
| Duncan to Doral (Florida) | 1,207.34 mi (1,943.02 km) |
| Duncan to Doraville (Georgia) | 780.47 mi (1,256.05 km) |
| Duncan to Dothan (Alabama) | 760.58 mi (1,224.04 km) |
| Duncan to Douglas (Arizona) | 708.02 mi (1,139.45 km) |
| Duncan to Douglas (Georgia) | 896.72 mi (1,443.13 km) |
| Duncan to Douglasville (Georgia) | 757.27 mi (1,218.71 km) |
| Duncan to Dover (Delaware) | 1,275.36 mi (2,052.50 km) |
