| South River to Sierpc | 4,214.26 mi (6,782.20 km) |
| South River to Skarzysko-Kamienna | 4,322.13 mi (6,955.79 km) |
| South River to Skawina | 4,322.15 mi (6,955.83 km) |
| South River to Skierniewice | 4,263.67 mi (6,861.72 km) |
| South River to Skoczow | 4,288.75 mi (6,902.08 km) |
| South River to Skwierzyna | 4,070.50 mi (6,550.83 km) |
| South River to Slawno | 4,057.94 mi (6,530.63 km) |
| South River to Slubice | 4,043.39 mi (6,507.20 km) |
| South River to Slupca | 4,168.16 mi (6,708.01 km) |
| South River to Slupsk | 4,067.22 mi (6,545.55 km) |
| South River to Sochaczew | 4,257.38 mi (6,851.59 km) |
| South River to Sokolka | 4,332.31 mi (6,972.18 km) |
| South River to Sokolow Podlaski | 4,324.43 mi (6,959.51 km) |
| South River to Solec Kujawski | 4,155.50 mi (6,687.63 km) |
| South River to Sopot | 4,122.36 mi (6,634.30 km) |
