| Harker Heights to Dover (New Hampshire) | 1,685.01 mi (2,711.76 km) |
| Harker Heights to Dover (New Jersey) | 1,452.26 mi (2,337.19 km) |
| Harker Heights to Dover (Ohio) | 1,114.62 mi (1,793.81 km) |
| Harker Heights to Downers Grove (Illinois) | 913.48 mi (1,470.10 km) |
| Harker Heights to Downey (California) | 1,208.21 mi (1,944.43 km) |
| Harker Heights to Dranesville (Virginia) | 1,267.70 mi (2,040.16 km) |
| Harker Heights to Draper (Utah) | 1,027.38 mi (1,653.41 km) |
| Harker Heights to Drexel Heights (Arizona) | 791.82 mi (1,274.31 km) |
| Harker Heights to Drexel Hill (Pennsylvania) | 1,393.46 mi (2,242.56 km) |
| Harker Heights to Duarte (California) | 1,199.04 mi (1,929.66 km) |
| Harker Heights to Dublin (California) | 1,452.39 mi (2,337.40 km) |
| Harker Heights to Dublin (Georgia) | 869.53 mi (1,399.37 km) |
| Harker Heights to Dublin (Ohio) | 1,024.89 mi (1,649.40 km) |
| Harker Heights to Dubuque (Iowa) | 878.14 mi (1,413.23 km) |
| Harker Heights to Duluth (Georgia) | 811.40 mi (1,305.83 km) |
