| Webster Groves to Sinop | 5,900.08 mi (9,495.26 km) |
| Webster Groves to Siran | 6,128.07 mi (9,862.18 km) |
| Webster Groves to Sirnak | 6,382.67 mi (10,271.92 km) |
| Webster Groves to Sirvan | 6,338.42 mi (10,200.70 km) |
| Webster Groves to Sivas | 6,083.62 mi (9,790.65 km) |
| Webster Groves to Sivasli | 5,894.09 mi (9,485.62 km) |
| Webster Groves to Siverek | 6,268.74 mi (10,088.56 km) |
| Webster Groves to Sivrice | 6,230.13 mi (10,026.42 km) |
| Webster Groves to Sivrihisar | 5,911.64 mi (9,513.86 km) |
| Webster Groves to Sogut | 5,834.15 mi (9,389.15 km) |
| Webster Groves to Sogutlu | 5,799.98 mi (9,334.16 km) |
| Webster Groves to Soke | 5,845.99 mi (9,408.22 km) |
| Webster Groves to Solhan | 6,256.94 mi (10,069.57 km) |
| Webster Groves to Soma | 5,782.01 mi (9,305.25 km) |
| Webster Groves to Sorgun | 6,019.15 mi (9,686.88 km) |
