| Round Rock to Sierpc | 5,556.64 mi (8,942.55 km) |
| Round Rock to Skarzysko-Kamienna | 5,675.48 mi (9,133.80 km) |
| Round Rock to Skawina | 5,689.20 mi (9,155.89 km) |
| Round Rock to Skierniewice | 5,612.53 mi (9,032.50 km) |
| Round Rock to Skoczow | 5,661.13 mi (9,110.71 km) |
| Round Rock to Skwierzyna | 5,430.51 mi (8,739.56 km) |
| Round Rock to Slawno | 5,397.32 mi (8,686.15 km) |
| Round Rock to Slubice | 5,408.75 mi (8,704.54 km) |
| Round Rock to Slupca | 5,522.58 mi (8,887.73 km) |
| Round Rock to Slupsk | 5,404.27 mi (8,697.34 km) |
| Round Rock to Sochaczew | 5,603.52 mi (9,018.00 km) |
| Round Rock to Sokolka | 5,654.30 mi (9,099.72 km) |
| Round Rock to Sokolow Podlaski | 5,661.01 mi (9,110.51 km) |
| Round Rock to Solec Kujawski | 5,501.41 mi (8,853.66 km) |
| Round Rock to Sopot | 5,453.93 mi (8,777.26 km) |
