| Harker Heights to Decatur (Alabama) | 664.20 mi (1,068.92 km) |
| Harker Heights to Decatur (Georgia) | 800.19 mi (1,287.79 km) |
| Harker Heights to Decatur (Illinois) | 780.09 mi (1,255.43 km) |
| Harker Heights to Deer Park (New York) | 1,510.38 mi (2,430.73 km) |
| Harker Heights to Deer Park (Texas) | 177.93 mi (286.35 km) |
| Harker Heights to Deerfield (Illinois) | 938.79 mi (1,510.84 km) |
| Harker Heights to Deerfield Beach (Florida) | 1,109.94 mi (1,786.28 km) |
| Harker Heights to Defiance (Ohio) | 1,021.25 mi (1,643.54 km) |
| Harker Heights to DeForest (Wisconsin) | 956.12 mi (1,538.72 km) |
| Harker Heights to DeKalb (Illinois) | 898.10 mi (1,445.35 km) |
| Harker Heights to Del Aire (California) | 1,221.74 mi (1,966.21 km) |
| Harker Heights to Del City (Oklahoma) | 303.62 mi (488.64 km) |
| Harker Heights to Del Rio (Texas) | 225.58 mi (363.04 km) |
| Harker Heights to DeLand (Florida) | 987.48 mi (1,589.19 km) |
| Harker Heights to Delano (California) | 1,285.64 mi (2,069.03 km) |
