| Harrow Weald to Sierpc | 848.18 mi (1,365.01 km) |
| Harrow Weald to Skarzysko-Kamienna | 914.42 mi (1,471.62 km) |
| Harrow Weald to Skawina | 885.23 mi (1,424.64 km) |
| Harrow Weald to Skierniewice | 873.20 mi (1,405.27 km) |
| Harrow Weald to Skoczow | 843.74 mi (1,357.87 km) |
| Harrow Weald to Skwierzyna | 674.36 mi (1,085.28 km) |
| Harrow Weald to Slawno | 730.89 mi (1,176.26 km) |
| Harrow Weald to Slubice | 635.34 mi (1,022.48 km) |
| Harrow Weald to Slupca | 774.70 mi (1,246.76 km) |
| Harrow Weald to Slupsk | 746.05 mi (1,200.65 km) |
| Harrow Weald to Sochaczew | 874.82 mi (1,407.89 km) |
| Harrow Weald to Sokolka | 1,005.52 mi (1,618.22 km) |
| Harrow Weald to Sokolow Podlaski | 958.50 mi (1,542.56 km) |
| Harrow Weald to Solec Kujawski | 788.32 mi (1,268.67 km) |
| Harrow Weald to Sopot | 807.16 mi (1,299.00 km) |
