| Duncan to Hunters Creek (Florida) | 1,059.63 mi (1,705.30 km) |
| Duncan to Huntersville (North Carolina) | 965.95 mi (1,554.55 km) |
| Duncan to Huntington (Indiana) | 806.49 mi (1,297.93 km) |
| Duncan to Huntington (Virginia) | 1,189.24 mi (1,913.90 km) |
| Duncan to Huntington (West Virginia) | 899.72 mi (1,447.97 km) |
| Duncan to Huntington Beach (California) | 1,148.21 mi (1,847.86 km) |
| Duncan to Huntington Park (California) | 1,157.65 mi (1,863.06 km) |
| Duncan to Huntington Station (New York) | 1,403.92 mi (2,259.39 km) |
| Duncan to Huntley (Illinois) | 734.92 mi (1,182.74 km) |
| Duncan to Huntsville (Alabama) | 641.15 mi (1,031.84 km) |
| Duncan to Huntsville (Texas) | 298.85 mi (480.95 km) |
| Duncan to Huron (South Dakota) | 678.77 mi (1,092.38 km) |
| Duncan to Hurricane (Utah) | 881.72 mi (1,419.00 km) |
| Duncan to Hurst (Texas) | 125.29 mi (201.64 km) |
| Duncan to Hutchinson (Kansas) | 243.64 mi (392.11 km) |
