| Hackettstown to Sierpc | 4,209.93 mi (6,775.23 km) |
| Hackettstown to Skarzysko-Kamienna | 4,318.60 mi (6,950.12 km) |
| Hackettstown to Skawina | 4,319.58 mi (6,951.70 km) |
| Hackettstown to Skierniewice | 4,259.81 mi (6,855.50 km) |
| Hackettstown to Skoczow | 4,286.55 mi (6,898.53 km) |
| Hackettstown to Skwierzyna | 4,067.24 mi (6,545.60 km) |
| Hackettstown to Slawno | 4,053.29 mi (6,523.14 km) |
| Hackettstown to Slubice | 4,040.49 mi (6,502.54 km) |
| Hackettstown to Slupca | 4,164.60 mi (6,702.27 km) |
| Hackettstown to Slupsk | 4,062.42 mi (6,537.83 km) |
| Hackettstown to Sochaczew | 4,253.33 mi (6,845.07 km) |
| Hackettstown to Sokolka | 4,326.80 mi (6,963.32 km) |
| Hackettstown to Sokolow Podlaski | 4,319.82 mi (6,952.08 km) |
| Hackettstown to Solec Kujawski | 4,151.35 mi (6,680.95 km) |
| Hackettstown to Sopot | 4,117.26 mi (6,626.09 km) |
