| Harker Heights to Delaware (Ohio) | 1,034.63 mi (1,665.08 km) |
| Harker Heights to Delhi (California) | 1,388.35 mi (2,234.33 km) |
| Harker Heights to Delray Beach (Florida) | 1,108.37 mi (1,783.75 km) |
| Harker Heights to Deltona (Florida) | 993.58 mi (1,599.02 km) |
| Harker Heights to Deming (New Mexico) | 600.03 mi (965.65 km) |
| Harker Heights to Denison (Texas) | 197.25 mi (317.45 km) |
| Harker Heights to Dent (Ohio) | 922.65 mi (1,484.86 km) |
| Harker Heights to Denton (Texas) | 152.13 mi (244.83 km) |
| Harker Heights to Dentsville (South Carolina) | 992.75 mi (1,597.67 km) |
| Harker Heights to Denver (Colorado) | 725.73 mi (1,167.94 km) |
| Harker Heights to Depew (New York) | 1,322.66 mi (2,128.62 km) |
| Harker Heights to Derby (Connecticut) | 1,534.90 mi (2,470.19 km) |
| Harker Heights to Derby (Kansas) | 449.65 mi (723.64 km) |
| Harker Heights to Des Moines (Iowa) | 760.21 mi (1,223.44 km) |
| Harker Heights to Des Moines (Washington) | 1,723.65 mi (2,773.95 km) |
