| Howard to Sinop | 5,503.02 mi (8,856.26 km) |
| Howard to Siran | 5,727.45 mi (9,217.43 km) |
| Howard to Sirnak | 5,980.45 mi (9,624.61 km) |
| Howard to Sirvan | 5,936.14 mi (9,553.29 km) |
| Howard to Sivas | 5,687.38 mi (9,152.96 km) |
| Howard to Sivasli | 5,514.65 mi (8,874.97 km) |
| Howard to Siverek | 5,871.77 mi (9,449.70 km) |
| Howard to Sivrice | 5,832.01 mi (9,385.71 km) |
| Howard to Sivrihisar | 5,526.26 mi (8,893.66 km) |
| Howard to Sogut | 5,450.18 mi (8,771.22 km) |
| Howard to Sogutlu | 5,413.49 mi (8,712.16 km) |
| Howard to Soke | 5,473.21 mi (8,808.27 km) |
| Howard to Solhan | 5,854.96 mi (9,422.65 km) |
| Howard to Soma | 5,405.20 mi (8,698.83 km) |
| Howard to Sorgun | 5,626.09 mi (9,054.32 km) |
