| Castelo Branco to Sierpc | 1,563.93 mi (2,516.90 km) |
| Castelo Branco to Skarzysko-Kamienna | 1,568.61 mi (2,524.44 km) |
| Castelo Branco to Skawina | 1,499.08 mi (2,412.53 km) |
| Castelo Branco to Skierniewice | 1,557.95 mi (2,507.27 km) |
| Castelo Branco to Skoczow | 1,450.93 mi (2,335.05 km) |
| Castelo Branco to Skwierzyna | 1,399.87 mi (2,252.87 km) |
| Castelo Branco to Slawno | 1,503.82 mi (2,420.16 km) |
| Castelo Branco to Slubice | 1,357.25 mi (2,184.28 km) |
| Castelo Branco to Slupca | 1,478.43 mi (2,379.30 km) |
| Castelo Branco to Slupsk | 1,519.84 mi (2,445.94 km) |
| Castelo Branco to Sochaczew | 1,568.09 mi (2,523.60 km) |
| Castelo Branco to Sokolka | 1,724.42 mi (2,775.19 km) |
| Castelo Branco to Sokolow Podlaski | 1,651.74 mi (2,658.22 km) |
| Castelo Branco to Solec Kujawski | 1,516.10 mi (2,439.93 km) |
| Castelo Branco to Sopot | 1,572.52 mi (2,530.73 km) |
