| Mason City to Sierpc | 4,699.80 mi (7,563.60 km) |
| Mason City to Skarzysko-Kamienna | 4,822.99 mi (7,761.85 km) |
| Mason City to Skawina | 4,844.14 mi (7,795.89 km) |
| Mason City to Skierniewice | 4,758.34 mi (7,657.81 km) |
| Mason City to Skoczow | 4,819.56 mi (7,756.33 km) |
| Mason City to Skwierzyna | 4,584.01 mi (7,377.26 km) |
| Mason City to Slawno | 4,540.56 mi (7,307.33 km) |
| Mason City to Slubice | 4,565.55 mi (7,347.54 km) |
| Mason City to Slupca | 4,672.12 mi (7,519.04 km) |
| Mason City to Slupsk | 4,546.37 mi (7,316.67 km) |
| Mason City to Sochaczew | 4,748.07 mi (7,641.27 km) |
| Mason City to Sokolka | 4,787.67 mi (7,705.00 km) |
| Mason City to Sokolow Podlaski | 4,800.52 mi (7,725.70 km) |
| Mason City to Solec Kujawski | 4,646.80 mi (7,478.30 km) |
| Mason City to Sopot | 4,593.09 mi (7,391.86 km) |
