| Harker Heights to Conyers (Georgia) | 815.98 mi (1,313.19 km) |
| Harker Heights to Cookeville (Tennessee) | 781.02 mi (1,256.94 km) |
| Harker Heights to Coolidge (Arizona) | 823.03 mi (1,324.54 km) |
| Harker Heights to Coon Rapids (Minnesota) | 1,003.14 mi (1,614.39 km) |
| Harker Heights to Cooper City (Florida) | 1,107.44 mi (1,782.25 km) |
| Harker Heights to Coos Bay (Oregon) | 1,681.71 mi (2,706.46 km) |
| Harker Heights to Copiague (New York) | 1,504.87 mi (2,421.86 km) |
| Harker Heights to Coppell (Texas) | 137.20 mi (220.81 km) |
| Harker Heights to Copperas Cove (Texas) | 16.51 mi (26.56 km) |
| Harker Heights to Coral Gables (Florida) | 1,117.45 mi (1,798.36 km) |
| Harker Heights to Coral Springs (Florida) | 1,103.24 mi (1,775.49 km) |
| Harker Heights to Coral Terrace (Florida) | 1,114.37 mi (1,793.41 km) |
| Harker Heights to Coralville (Iowa) | 808.04 mi (1,300.41 km) |
| Harker Heights to Coram (New York) | 1,528.66 mi (2,460.13 km) |
| Harker Heights to Corcoran (California) | 1,305.45 mi (2,100.92 km) |
