| Duncan to Des Plaines (Illinois) | 749.61 mi (1,206.38 km) |
| Duncan to Desert Hot Springs (California) | 1,062.80 mi (1,710.40 km) |
| Duncan to DeSoto (Texas) | 147.33 mi (237.11 km) |
| Duncan to Destin (Florida) | 725.81 mi (1,168.08 km) |
| Duncan to Destrehan (Louisiana) | 542.76 mi (873.48 km) |
| Duncan to Detroit (Michigan) | 965.46 mi (1,553.75 km) |
| Duncan to Diamond Bar (California) | 1,134.73 mi (1,826.17 km) |
| Duncan to Diamond Springs (California) | 1,299.22 mi (2,090.90 km) |
| Duncan to Dickinson (North Dakota) | 890.22 mi (1,432.66 km) |
| Duncan to Dickinson (Texas) | 389.33 mi (626.57 km) |
| Duncan to Dickson (Tennessee) | 604.09 mi (972.18 km) |
| Duncan to Difficult Run (Virginia) | 1,175.77 mi (1,892.22 km) |
| Duncan to Dinuba (California) | 1,212.81 mi (1,951.83 km) |
| Duncan to Discovery Bay (California) | 1,336.33 mi (2,150.62 km) |
| Duncan to Dix Hills (New York) | 1,406.89 mi (2,264.18 km) |
