| Webster Groves to Sesena | 4,429.59 mi (7,128.74 km) |
| Webster Groves to Sestao | 4,352.23 mi (7,004.23 km) |
| Webster Groves to Sevilla | 4,421.21 mi (7,115.26 km) |
| Webster Groves to Sevilla La Nueva | 4,406.10 mi (7,090.93 km) |
| Webster Groves to Silla | 4,605.93 mi (7,412.52 km) |
| Webster Groves to Silleda | 4,137.77 mi (6,659.09 km) |
| Webster Groves to Sitges | 4,636.87 mi (7,462.32 km) |
| Webster Groves to Socuellamos | 4,499.29 mi (7,240.91 km) |
| Webster Groves to Soller | 4,731.02 mi (7,613.84 km) |
| Webster Groves to Solsona | 4,596.60 mi (7,397.51 km) |
| Webster Groves to Son Servera | 4,765.91 mi (7,670.00 km) |
| Webster Groves to Sonseca | 4,431.91 mi (7,132.46 km) |
| Webster Groves to Sopelana | 4,351.04 mi (7,002.32 km) |
| Webster Groves to Soria | 4,428.30 mi (7,126.67 km) |
| Webster Groves to Suances | 4,302.09 mi (6,923.54 km) |
