| Portalegre to Sierpc | 1,585.09 mi (2,550.95 km) |
| Portalegre to Skarzysko-Kamienna | 1,587.30 mi (2,554.52 km) |
| Portalegre to Skawina | 1,516.60 mi (2,440.73 km) |
| Portalegre to Skierniewice | 1,577.89 mi (2,539.38 km) |
| Portalegre to Skoczow | 1,468.51 mi (2,363.34 km) |
| Portalegre to Skwierzyna | 1,422.22 mi (2,288.84 km) |
| Portalegre to Slawno | 1,527.60 mi (2,458.43 km) |
| Portalegre to Slubice | 1,379.70 mi (2,220.42 km) |
| Portalegre to Slupca | 1,499.52 mi (2,413.24 km) |
| Portalegre to Slupsk | 1,543.59 mi (2,484.17 km) |
| Portalegre to Sochaczew | 1,588.33 mi (2,556.17 km) |
| Portalegre to Sokolka | 1,745.09 mi (2,808.45 km) |
| Portalegre to Sokolow Podlaski | 1,671.61 mi (2,690.20 km) |
| Portalegre to Solec Kujawski | 1,537.96 mi (2,475.11 km) |
| Portalegre to Sopot | 1,595.72 mi (2,568.07 km) |
