| Harker Heights to Abilene (Texas) | 156.36 mi (251.63 km) |
| Harker Heights to Accokeek (Maryland) | 1,279.29 mi (2,058.81 km) |
| Harker Heights to Acworth (Georgia) | 782.76 mi (1,259.74 km) |
| Harker Heights to Ada (Oklahoma) | 262.45 mi (422.37 km) |
| Harker Heights to Addison (Illinois) | 921.12 mi (1,482.40 km) |
| Harker Heights to Addison (Texas) | 139.69 mi (224.81 km) |
| Harker Heights to Adelanto (California) | 1,172.85 mi (1,887.53 km) |
| Harker Heights to Adelphi (Maryland) | 1,288.35 mi (2,073.40 km) |
| Harker Heights to Adrian (Michigan) | 1,061.42 mi (1,708.19 km) |
| Harker Heights to Affton (Missouri) | 663.11 mi (1,067.17 km) |
| Harker Heights to Agoura Hills (California) | 1,245.19 mi (2,003.94 km) |
| Harker Heights to Aguadilla (Puerto Rico) | 2,093.03 mi (3,368.40 km) |
| Harker Heights to Aiken (South Carolina) | 944.25 mi (1,519.62 km) |
| Harker Heights to Akron (Ohio) | 1,132.74 mi (1,822.97 km) |
| Harker Heights to Alabaster (Alabama) | 650.21 mi (1,046.41 km) |
