| Middle River to Sierpc | 4,343.92 mi (6,990.86 km) |
| Middle River to Skarzysko-Kamienna | 4,452.35 mi (7,165.37 km) |
| Middle River to Skawina | 4,452.97 mi (7,166.37 km) |
| Middle River to Skierniewice | 4,393.66 mi (7,070.92 km) |
| Middle River to Skoczow | 4,419.78 mi (7,112.94 km) |
| Middle River to Skwierzyna | 4,200.90 mi (6,760.69 km) |
| Middle River to Slawno | 4,187.35 mi (6,738.88 km) |
| Middle River to Slubice | 4,174.01 mi (6,717.42 km) |
| Middle River to Slupca | 4,298.36 mi (6,917.54 km) |
| Middle River to Slupsk | 4,196.51 mi (6,753.63 km) |
| Middle River to Sochaczew | 4,387.24 mi (7,060.58 km) |
| Middle River to Sokolka | 4,461.01 mi (7,179.31 km) |
| Middle River to Sokolow Podlaski | 4,453.87 mi (7,167.81 km) |
| Middle River to Solec Kujawski | 4,285.28 mi (6,896.50 km) |
| Middle River to Sopot | 4,251.41 mi (6,841.98 km) |
