| Foster City to Sinop | 6,757.16 mi (10,874.60 km) |
| Foster City to Siran | 6,937.34 mi (11,164.57 km) |
| Foster City to Sirnak | 7,158.86 mi (11,521.07 km) |
| Foster City to Sirvan | 7,117.09 mi (11,453.85 km) |
| Foster City to Sivas | 6,936.26 mi (11,162.83 km) |
| Foster City to Sivasli | 6,888.13 mi (11,085.37 km) |
| Foster City to Siverek | 7,102.85 mi (11,430.93 km) |
| Foster City to Sivrice | 7,056.25 mi (11,355.94 km) |
| Foster City to Sivrihisar | 6,862.49 mi (11,044.11 km) |
| Foster City to Sogut | 6,799.74 mi (10,943.13 km) |
| Foster City to Sogutlu | 6,748.98 mi (10,861.43 km) |
| Foster City to Soke | 6,886.22 mi (11,082.30 km) |
| Foster City to Solhan | 7,044.28 mi (11,336.67 km) |
| Foster City to Soma | 6,799.71 mi (10,943.08 km) |
| Foster City to Sorgun | 6,903.22 mi (11,109.66 km) |
