| Fort Collins to Sierpc | 5,188.90 mi (8,350.73 km) |
| Fort Collins to Skarzysko-Kamienna | 5,316.78 mi (8,556.53 km) |
| Fort Collins to Skawina | 5,347.08 mi (8,605.30 km) |
| Fort Collins to Skierniewice | 5,250.50 mi (8,449.86 km) |
| Fort Collins to Skoczow | 5,326.84 mi (8,572.72 km) |
| Fort Collins to Skwierzyna | 5,087.76 mi (8,187.96 km) |
| Fort Collins to Slawno | 5,031.40 mi (8,097.26 km) |
| Fort Collins to Slubice | 5,073.41 mi (8,164.86 km) |
| Fort Collins to Slupca | 5,170.03 mi (8,320.36 km) |
| Fort Collins to Slupsk | 5,035.53 mi (8,103.91 km) |
| Fort Collins to Sochaczew | 5,238.60 mi (8,430.72 km) |
| Fort Collins to Sokolka | 5,261.13 mi (8,466.97 km) |
| Fort Collins to Sokolow Podlaski | 5,283.38 mi (8,502.79 km) |
| Fort Collins to Solec Kujawski | 5,139.51 mi (8,271.24 km) |
| Fort Collins to Sopot | 5,077.52 mi (8,171.48 km) |
