| Harker Heights to Dallas (Oregon) | 1,682.80 mi (2,708.20 km) |
| Harker Heights to Dallas (Texas) | 130.54 mi (210.09 km) |
| Harker Heights to Dalton (Georgia) | 777.82 mi (1,251.78 km) |
| Harker Heights to Daly City (California) | 1,482.72 mi (2,386.21 km) |
| Harker Heights to Damascus (Maryland) | 1,282.85 mi (2,064.55 km) |
| Harker Heights to Damascus (Oregon) | 1,660.77 mi (2,672.75 km) |
| Harker Heights to Dana Point (California) | 1,181.47 mi (1,901.40 km) |
| Harker Heights to Danbury (Connecticut) | 1,517.78 mi (2,442.64 km) |
| Harker Heights to Dania Beach (Florida) | 1,114.14 mi (1,793.04 km) |
| Harker Heights to Danville (California) | 1,457.63 mi (2,345.82 km) |
| Harker Heights to Danville (Illinois) | 842.51 mi (1,355.89 km) |
| Harker Heights to Danville (Indiana) | 867.68 mi (1,396.39 km) |
| Harker Heights to Danville (Kentucky) | 862.30 mi (1,387.74 km) |
| Harker Heights to Danville (Virginia) | 1,112.04 mi (1,789.65 km) |
| Harker Heights to Daphne (Alabama) | 579.74 mi (933.01 km) |
