| Harker Heights to Darby (Pennsylvania) | 1,394.96 mi (2,244.97 km) |
| Harker Heights to Dardenne Prairie (Missouri) | 660.14 mi (1,062.39 km) |
| Harker Heights to Darien (Illinois) | 911.91 mi (1,467.58 km) |
| Harker Heights to Davenport (Iowa) | 823.82 mi (1,325.81 km) |
| Harker Heights to Davidson (North Carolina) | 1,017.12 mi (1,636.90 km) |
| Harker Heights to Davie (Florida) | 1,106.54 mi (1,780.81 km) |
| Harker Heights to Davis (California) | 1,456.34 mi (2,343.75 km) |
| Harker Heights to Dayton (Nevada) | 1,357.08 mi (2,184.01 km) |
| Harker Heights to Dayton (Ohio) | 965.74 mi (1,554.21 km) |
| Harker Heights to Daytona Beach (Florida) | 996.14 mi (1,603.14 km) |
| Harker Heights to De Pere (Wisconsin) | 1,059.84 mi (1,705.65 km) |
| Harker Heights to De Witt (New York) | 1,441.64 mi (2,320.10 km) |
| Harker Heights to Dearborn (Michigan) | 1,112.42 mi (1,790.27 km) |
| Harker Heights to Dearborn Heights (Michigan) | 1,110.08 mi (1,786.50 km) |
| Harker Heights to DeBary (Florida) | 987.43 mi (1,589.12 km) |
