| Harker Heights to Dixon (California) | 1,459.25 mi (2,348.43 km) |
| Harker Heights to Dixon (Illinois) | 871.58 mi (1,402.67 km) |
| Harker Heights to Dobbs Ferry (New York) | 1,489.08 mi (2,396.44 km) |
| Harker Heights to Doctor Phillips (Florida) | 984.65 mi (1,584.63 km) |
| Harker Heights to Dodge City (Kansas) | 482.50 mi (776.51 km) |
| Harker Heights to Dolton (Illinois) | 918.42 mi (1,478.06 km) |
| Harker Heights to Donna (Texas) | 340.19 mi (547.48 km) |
| Harker Heights to Dorado (Puerto Rico) | 2,141.96 mi (3,447.14 km) |
| Harker Heights to Doral (Florida) | 1,109.55 mi (1,785.65 km) |
| Harker Heights to Doraville (Georgia) | 803.28 mi (1,292.76 km) |
| Harker Heights to Dothan (Alabama) | 723.39 mi (1,164.19 km) |
| Harker Heights to Douglas (Arizona) | 702.89 mi (1,131.19 km) |
| Harker Heights to Douglas (Georgia) | 873.23 mi (1,405.33 km) |
| Harker Heights to Douglasville (Georgia) | 776.66 mi (1,249.91 km) |
| Harker Heights to Dover (Delaware) | 1,365.41 mi (2,197.42 km) |
