| West Chicago to Sesena | 4,216.25 mi (6,785.40 km) |
| West Chicago to Sestao | 4,130.93 mi (6,648.10 km) |
| West Chicago to Sevilla | 4,217.57 mi (6,787.53 km) |
| West Chicago to Sevilla La Nueva | 4,192.53 mi (6,747.23 km) |
| West Chicago to Silla | 4,390.69 mi (7,066.14 km) |
| West Chicago to Silleda | 3,922.77 mi (6,313.08 km) |
| West Chicago to Sitges | 4,415.37 mi (7,105.85 km) |
| West Chicago to Socuellamos | 4,286.85 mi (6,899.02 km) |
| West Chicago to Soller | 4,511.58 mi (7,260.69 km) |
| West Chicago to Solsona | 4,373.85 mi (7,039.03 km) |
| West Chicago to Son Servera | 4,546.08 mi (7,316.20 km) |
| West Chicago to Sonseca | 4,219.79 mi (6,791.09 km) |
| West Chicago to Sopelana | 4,129.57 mi (6,645.90 km) |
| West Chicago to Soria | 4,209.89 mi (6,775.17 km) |
| West Chicago to Suances | 4,081.47 mi (6,568.50 km) |
