| Harker Heights to Castle Pines (Colorado) | 708.98 mi (1,140.99 km) |
| Harker Heights to Castle Rock (Colorado) | 703.69 mi (1,132.48 km) |
| Harker Heights to Castro Valley (California) | 1,461.21 mi (2,351.59 km) |
| Harker Heights to Catalina Foothills (Arizona) | 782.68 mi (1,259.60 km) |
| Harker Heights to Cataño (Puerto Rico) | 2,150.23 mi (3,460.46 km) |
| Harker Heights to Cathedral City (California) | 1,112.35 mi (1,790.15 km) |
| Harker Heights to Catonsville (Maryland) | 1,305.56 mi (2,101.10 km) |
| Harker Heights to Cave Spring (Virginia) | 1,092.71 mi (1,758.55 km) |
| Harker Heights to Cayce (South Carolina) | 986.60 mi (1,587.78 km) |
| Harker Heights to Cayey (Puerto Rico) | 2,160.37 mi (3,476.78 km) |
| Harker Heights to Cedar City (Utah) | 991.20 mi (1,595.18 km) |
| Harker Heights to Cedar Falls (Iowa) | 842.00 mi (1,355.06 km) |
| Harker Heights to Cedar Hill (Texas) | 112.71 mi (181.39 km) |
| Harker Heights to Cedar Lake (Indiana) | 910.37 mi (1,465.10 km) |
| Harker Heights to Cedar Mill (Oregon) | 1,679.68 mi (2,703.18 km) |
