| Harker Heights to Duluth (Minnesota) | 1,124.90 mi (1,810.36 km) |
| Harker Heights to Dumas (Texas) | 414.83 mi (667.60 km) |
| Harker Heights to Dumont (New Jersey) | 1,481.48 mi (2,384.21 km) |
| Harker Heights to Duncan (Oklahoma) | 241.23 mi (388.22 km) |
| Harker Heights to Duncanville (Texas) | 117.88 mi (189.71 km) |
| Harker Heights to Dundalk (Maryland) | 1,318.24 mi (2,121.50 km) |
| Harker Heights to Dunedin (Florida) | 916.45 mi (1,474.88 km) |
| Harker Heights to Dunkirk (New York) | 1,279.80 mi (2,059.64 km) |
| Harker Heights to Dunmore (Pennsylvania) | 1,415.34 mi (2,277.78 km) |
| Harker Heights to Dunwoody (Georgia) | 801.41 mi (1,289.74 km) |
| Harker Heights to Durango (Colorado) | 724.74 mi (1,166.35 km) |
| Harker Heights to Durant (Oklahoma) | 215.68 mi (347.11 km) |
| Harker Heights to Durham (North Carolina) | 1,129.78 mi (1,818.21 km) |
| Harker Heights to Dyer (Indiana) | 914.60 mi (1,471.91 km) |
| Harker Heights to Dyersburg (Tennessee) | 587.35 mi (945.25 km) |
