| Harker Heights to Cullman (Alabama) | 664.26 mi (1,069.03 km) |
| Harker Heights to Culpeper (Virginia) | 1,223.69 mi (1,969.34 km) |
| Harker Heights to Culver City (California) | 1,223.72 mi (1,969.38 km) |
| Harker Heights to Cumberland (Maryland) | 1,215.11 mi (1,955.52 km) |
| Harker Heights to Cupertino (California) | 1,455.40 mi (2,342.24 km) |
| Harker Heights to Cutler Bay (Florida) | 1,117.30 mi (1,798.11 km) |
| Harker Heights to Cutlerville (Michigan) | 1,046.43 mi (1,684.07 km) |
| Harker Heights to Cuyahoga Falls (Ohio) | 1,135.94 mi (1,828.12 km) |
| Harker Heights to Cypress (California) | 1,202.38 mi (1,935.05 km) |
| Harker Heights to Cypress Gardens (Florida) | 981.38 mi (1,579.38 km) |
| Harker Heights to Cypress Lake (Florida) | 1,002.00 mi (1,612.57 km) |
| Harker Heights to D'Iberville (Mississippi) | 520.55 mi (837.74 km) |
| Harker Heights to Dakota Ridge (Colorado) | 726.12 mi (1,168.58 km) |
| Harker Heights to Dale City (Virginia) | 1,261.09 mi (2,029.53 km) |
| Harker Heights to Dallas (Georgia) | 771.27 mi (1,241.23 km) |
