| Harlow to Sierpc | 825.92 mi (1,329.19 km) |
| Harlow to Skarzysko-Kamienna | 893.31 mi (1,437.64 km) |
| Harlow to Skawina | 865.20 mi (1,392.41 km) |
| Harlow to Skierniewice | 851.51 mi (1,370.38 km) |
| Harlow to Skoczow | 824.08 mi (1,326.22 km) |
| Harlow to Skwierzyna | 652.34 mi (1,049.84 km) |
| Harlow to Slawno | 707.86 mi (1,139.19 km) |
| Harlow to Slubice | 613.55 mi (987.42 km) |
| Harlow to Slupca | 752.87 mi (1,211.63 km) |
| Harlow to Slupsk | 722.98 mi (1,163.53 km) |
| Harlow to Sochaczew | 852.95 mi (1,372.70 km) |
| Harlow to Sokolka | 982.94 mi (1,581.90 km) |
| Harlow to Sokolow Podlaski | 936.45 mi (1,507.08 km) |
| Harlow to Solec Kujawski | 765.95 mi (1,232.67 km) |
| Harlow to Sopot | 784.14 mi (1,261.96 km) |
