| Harker Heights to Sinop | 6,563.04 mi (10,562.19 km) |
| Harker Heights to Siran | 6,790.07 mi (10,927.56 km) |
| Harker Heights to Sirnak | 7,044.13 mi (11,336.44 km) |
| Harker Heights to Sirvan | 6,999.85 mi (11,265.17 km) |
| Harker Heights to Sivas | 6,746.79 mi (10,857.91 km) |
| Harker Heights to Sivasli | 6,557.64 mi (10,553.50 km) |
| Harker Heights to Siverek | 6,931.77 mi (11,155.61 km) |
| Harker Heights to Sivrice | 6,892.88 mi (11,093.02 km) |
| Harker Heights to Sivrihisar | 6,575.65 mi (10,582.49 km) |
| Harker Heights to Sogut | 6,498.11 mi (10,457.70 km) |
| Harker Heights to Sogutlu | 6,464.02 mi (10,402.83 km) |
| Harker Heights to Soke | 6,508.41 mi (10,474.27 km) |
| Harker Heights to Solhan | 6,918.47 mi (11,134.21 km) |
| Harker Heights to Soma | 6,445.20 mi (10,372.56 km) |
| Harker Heights to Sorgun | 6,682.83 mi (10,754.97 km) |
