| Harker Heights to Smyrna (Delaware) | 1,363.69 mi (2,194.65 km) |
| Harker Heights to Smyrna (Georgia) | 788.87 mi (1,269.57 km) |
| Harker Heights to Smyrna (Tennessee) | 724.16 mi (1,165.43 km) |
| Harker Heights to Snellville (Georgia) | 817.75 mi (1,316.04 km) |
| Harker Heights to Snoqualmie (Washington) | 1,710.09 mi (2,752.12 km) |
| Harker Heights to Snyder (Texas) | 223.21 mi (359.22 km) |
| Harker Heights to Socastee (South Carolina) | 1,101.01 mi (1,771.91 km) |
| Harker Heights to Socorro (Texas) | 509.83 mi (820.49 km) |
| Harker Heights to Soddy-Daisy (Tennessee) | 776.79 mi (1,250.12 km) |
| Harker Heights to Solana Beach (California) | 1,154.95 mi (1,858.71 km) |
| Harker Heights to Soledad (California) | 1,407.31 mi (2,264.84 km) |
| Harker Heights to Solon (Ohio) | 1,147.83 mi (1,847.25 km) |
| Harker Heights to Somers Point (New Jersey) | 1,415.31 mi (2,277.72 km) |
| Harker Heights to Somerset (Kentucky) | 853.14 mi (1,373.00 km) |
| Harker Heights to Somerset (New Jersey) | 1,446.21 mi (2,327.46 km) |
