| Webster Groves to Sierpc | 4,862.49 mi (7,825.42 km) |
| Webster Groves to Skarzysko-Kamienna | 4,981.06 mi (8,016.25 km) |
| Webster Groves to Skawina | 4,994.71 mi (8,038.21 km) |
| Webster Groves to Skierniewice | 4,918.20 mi (7,915.08 km) |
| Webster Groves to Skoczow | 4,966.73 mi (7,993.17 km) |
| Webster Groves to Skwierzyna | 4,736.00 mi (7,621.85 km) |
| Webster Groves to Slawno | 4,703.20 mi (7,569.07 km) |
| Webster Groves to Slubice | 4,714.27 mi (7,586.89 km) |
| Webster Groves to Slupca | 4,828.12 mi (7,770.10 km) |
| Webster Groves to Slupsk | 4,710.25 mi (7,580.42 km) |
| Webster Groves to Sochaczew | 4,909.27 mi (7,900.70 km) |
| Webster Groves to Sokolka | 4,961.30 mi (7,984.45 km) |
| Webster Groves to Sokolow Podlaski | 4,967.16 mi (7,993.87 km) |
| Webster Groves to Solec Kujawski | 4,807.12 mi (7,736.31 km) |
| Webster Groves to Sopot | 4,760.19 mi (7,660.79 km) |
