| Herndon to Sierpc | 4,397.63 mi (7,077.30 km) |
| Herndon to Skarzysko-Kamienna | 4,506.51 mi (7,252.52 km) |
| Herndon to Skawina | 4,507.61 mi (7,254.30 km) |
| Herndon to Skierniewice | 4,447.63 mi (7,157.77 km) |
| Herndon to Skoczow | 4,474.59 mi (7,201.16 km) |
| Herndon to Skwierzyna | 4,255.20 mi (6,848.08 km) |
| Herndon to Slawno | 4,240.88 mi (6,825.04 km) |
| Herndon to Slubice | 4,228.49 mi (6,805.10 km) |
| Herndon to Slupca | 4,352.49 mi (7,004.66 km) |
| Herndon to Slupsk | 4,249.96 mi (6,839.66 km) |
| Herndon to Sochaczew | 4,441.11 mi (7,147.27 km) |
| Herndon to Sokolka | 4,514.04 mi (7,264.64 km) |
| Herndon to Sokolow Podlaski | 4,507.42 mi (7,253.99 km) |
| Herndon to Solec Kujawski | 4,339.10 mi (6,983.11 km) |
| Herndon to Sopot | 4,304.69 mi (6,927.72 km) |
