| Harker Heights to Des Plaines (Illinois) | 930.14 mi (1,496.92 km) |
| Harker Heights to Desert Hot Springs (California) | 1,117.55 mi (1,798.52 km) |
| Harker Heights to DeSoto (Texas) | 115.99 mi (186.67 km) |
| Harker Heights to Destin (Florida) | 664.99 mi (1,070.20 km) |
| Harker Heights to Destrehan (Louisiana) | 439.64 mi (707.53 km) |
| Harker Heights to Detroit (Michigan) | 1,119.89 mi (1,802.29 km) |
| Harker Heights to Diamond Bar (California) | 1,190.50 mi (1,915.93 km) |
| Harker Heights to Diamond Springs (California) | 1,411.66 mi (2,271.85 km) |
| Harker Heights to Dickinson (North Dakota) | 1,127.82 mi (1,815.05 km) |
| Harker Heights to Dickinson (Texas) | 189.92 mi (305.64 km) |
| Harker Heights to Dickson (Tennessee) | 684.87 mi (1,102.19 km) |
| Harker Heights to Difficult Run (Virginia) | 1,266.68 mi (2,038.53 km) |
| Harker Heights to Dinuba (California) | 1,301.98 mi (2,095.33 km) |
| Harker Heights to Discovery Bay (California) | 1,439.14 mi (2,316.07 km) |
| Harker Heights to Dix Hills (New York) | 1,510.51 mi (2,430.93 km) |
