| Harker Heights to Carrollwood (Florida) | 931.81 mi (1,499.61 km) |
| Harker Heights to Carson (California) | 1,214.92 mi (1,955.22 km) |
| Harker Heights to Carson City (Nevada) | 1,364.11 mi (2,195.33 km) |
| Harker Heights to Carteret (New Jersey) | 1,461.47 mi (2,352.01 km) |
| Harker Heights to Cartersville (Georgia) | 777.10 mi (1,250.62 km) |
| Harker Heights to Carthage (Missouri) | 461.82 mi (743.22 km) |
| Harker Heights to Cary (Illinois) | 928.95 mi (1,495.00 km) |
| Harker Heights to Cary (North Carolina) | 1,131.54 mi (1,821.04 km) |
| Harker Heights to Casa de Oro-Mount Helix (California) | 1,137.92 mi (1,831.30 km) |
| Harker Heights to Casa Grande (Arizona) | 836.54 mi (1,346.28 km) |
| Harker Heights to Casas Adobes (Arizona) | 790.24 mi (1,271.77 km) |
| Harker Heights to Cascades (Virginia) | 1,267.96 mi (2,040.58 km) |
| Harker Heights to Casper (Wyoming) | 943.49 mi (1,518.40 km) |
| Harker Heights to Casselberry (Florida) | 991.03 mi (1,594.90 km) |
| Harker Heights to Castaic (California) | 1,239.66 mi (1,995.04 km) |
