| Serpa to Sierpc | 1,660.34 mi (2,672.06 km) |
| Serpa to Skarzysko-Kamienna | 1,657.36 mi (2,667.26 km) |
| Serpa to Skawina | 1,584.23 mi (2,549.57 km) |
| Serpa to Skierniewice | 1,650.63 mi (2,656.43 km) |
| Serpa to Skoczow | 1,536.34 mi (2,472.50 km) |
| Serpa to Skwierzyna | 1,500.05 mi (2,414.09 km) |
| Serpa to Slawno | 1,608.13 mi (2,588.04 km) |
| Serpa to Slubice | 1,457.79 mi (2,346.09 km) |
| Serpa to Slupca | 1,574.72 mi (2,534.26 km) |
| Serpa to Slupsk | 1,624.07 mi (2,613.69 km) |
| Serpa to Sochaczew | 1,661.66 mi (2,674.19 km) |
| Serpa to Sokolka | 1,819.16 mi (2,927.65 km) |
| Serpa to Sokolow Podlaski | 1,744.08 mi (2,806.82 km) |
| Serpa to Solec Kujawski | 1,614.69 mi (2,598.60 km) |
| Serpa to Sopot | 1,675.08 mi (2,695.77 km) |
