| Boulder to Sierpc | 5,224.98 mi (8,408.79 km) |
| Boulder to Skarzysko-Kamienna | 5,352.76 mi (8,614.43 km) |
| Boulder to Skawina | 5,382.82 mi (8,662.81 km) |
| Boulder to Skierniewice | 5,286.51 mi (8,507.81 km) |
| Boulder to Skoczow | 5,362.45 mi (8,630.02 km) |
| Boulder to Skwierzyna | 5,123.43 mi (8,245.37 km) |
| Boulder to Slawno | 5,067.41 mi (8,155.21 km) |
| Boulder to Slubice | 5,108.96 mi (8,222.07 km) |
| Boulder to Slupca | 5,205.88 mi (8,378.05 km) |
| Boulder to Slupsk | 5,071.59 mi (8,161.93 km) |
| Boulder to Sochaczew | 5,274.65 mi (8,488.73 km) |
| Boulder to Sokolka | 5,297.56 mi (8,525.60 km) |
| Boulder to Sokolow Podlaski | 5,319.62 mi (8,561.10 km) |
| Boulder to Solec Kujawski | 5,175.49 mi (8,329.15 km) |
| Boulder to Sopot | 5,113.69 mi (8,229.69 km) |
