| Duncan to Haverhill (Massachusetts) | 1,547.46 mi (2,490.40 km) |
| Duncan to Havre de Grace (Maryland) | 1,247.83 mi (2,008.19 km) |
| Duncan to Hawaiian Gardens (California) | 1,150.90 mi (1,852.19 km) |
| Duncan to Hawaiian Paradise Park (Hawaii) | 3,610.34 mi (5,810.28 km) |
| Duncan to Hawthorne (California) | 1,165.70 mi (1,876.01 km) |
| Duncan to Hawthorne (New Jersey) | 1,366.72 mi (2,199.52 km) |
| Duncan to Hayden (Idaho) | 1,335.01 mi (2,148.49 km) |
| Duncan to Hayesville (Oregon) | 1,504.66 mi (2,421.52 km) |
| Duncan to Hays (Kansas) | 309.81 mi (498.59 km) |
| Duncan to Haysville (Kansas) | 211.34 mi (340.12 km) |
| Duncan to Hayward (California) | 1,361.66 mi (2,191.38 km) |
| Duncan to Hazel Crest (Illinois) | 737.92 mi (1,187.56 km) |
| Duncan to Hazel Dell (Washington) | 1,507.52 mi (2,426.12 km) |
| Duncan to Hazel Park (Michigan) | 968.33 mi (1,558.37 km) |
| Duncan to Hazelwood (Missouri) | 510.15 mi (821.00 km) |
