| Seia to Sierpc | 1,542.77 mi (2,482.84 km) |
| Seia to Skarzysko-Kamienna | 1,550.83 mi (2,495.83 km) |
| Seia to Skawina | 1,482.91 mi (2,386.52 km) |
| Seia to Skierniewice | 1,538.46 mi (2,475.91 km) |
| Seia to Skoczow | 1,434.73 mi (2,308.97 km) |
| Seia to Skwierzyna | 1,377.16 mi (2,216.33 km) |
| Seia to Slawno | 1,479.05 mi (2,380.30 km) |
| Seia to Slubice | 1,334.42 mi (2,147.55 km) |
| Seia to Slupca | 1,457.42 mi (2,345.48 km) |
| Seia to Slupsk | 1,495.09 mi (2,406.11 km) |
| Seia to Sochaczew | 1,548.20 mi (2,491.59 km) |
| Seia to Sokolka | 1,703.87 mi (2,742.12 km) |
| Seia to Sokolow Podlaski | 1,632.32 mi (2,626.96 km) |
| Seia to Solec Kujawski | 1,494.00 mi (2,404.36 km) |
| Seia to Sopot | 1,548.53 mi (2,492.11 km) |
