| Harker Heights to Carlsbad (California) | 1,156.70 mi (1,861.53 km) |
| Harker Heights to Carlsbad (New Mexico) | 398.41 mi (641.18 km) |
| Harker Heights to Carmel (Indiana) | 891.30 mi (1,434.42 km) |
| Harker Heights to Carmichael (California) | 1,436.07 mi (2,311.13 km) |
| Harker Heights to Carney (Maryland) | 1,319.81 mi (2,124.03 km) |
| Harker Heights to Carnot-Moon (Pennsylvania) | 1,171.87 mi (1,885.94 km) |
| Harker Heights to Carol Stream (Illinois) | 916.51 mi (1,474.98 km) |
| Harker Heights to Carolina (Puerto Rico) | 2,160.69 mi (3,477.30 km) |
| Harker Heights to Carolina Forest (South Carolina) | 1,106.91 mi (1,781.40 km) |
| Harker Heights to Carpentersville (Illinois) | 922.74 mi (1,485.00 km) |
| Harker Heights to Carpinteria (California) | 1,289.17 mi (2,074.72 km) |
| Harker Heights to Carrboro (North Carolina) | 1,118.86 mi (1,800.63 km) |
| Harker Heights to Carroll (Iowa) | 776.26 mi (1,249.27 km) |
| Harker Heights to Carrollton (Georgia) | 753.34 mi (1,212.38 km) |
| Harker Heights to Carrollton (Texas) | 140.42 mi (225.99 km) |
