| Williamstown to Sierpc | 4,274.17 mi (6,878.60 km) |
| Williamstown to Skarzysko-Kamienna | 4,381.73 mi (7,051.71 km) |
| Williamstown to Skawina | 4,381.37 mi (7,051.13 km) |
| Williamstown to Skierniewice | 4,323.41 mi (6,957.85 km) |
| Williamstown to Skoczow | 4,347.81 mi (6,997.12 km) |
| Williamstown to Skwierzyna | 4,130.00 mi (6,646.60 km) |
| Williamstown to Slawno | 4,117.96 mi (6,627.21 km) |
| Williamstown to Slubice | 4,102.74 mi (6,602.73 km) |
| Williamstown to Slupca | 4,227.78 mi (6,803.96 km) |
| Williamstown to Slupsk | 4,127.28 mi (6,642.21 km) |
| Williamstown to Sochaczew | 4,317.18 mi (6,947.83 km) |
| Williamstown to Sokolka | 4,392.59 mi (7,069.19 km) |
| Williamstown to Sokolow Podlaski | 4,384.43 mi (7,056.06 km) |
| Williamstown to Solec Kujawski | 4,215.33 mi (6,783.92 km) |
| Williamstown to Sopot | 4,182.52 mi (6,731.11 km) |
