| Portsmouth to Sierpc | 894.20 mi (1,439.07 km) |
| Portsmouth to Skarzysko-Kamienna | 954.24 mi (1,535.70 km) |
| Portsmouth to Skawina | 920.14 mi (1,480.83 km) |
| Portsmouth to Skierniewice | 915.94 mi (1,474.06 km) |
| Portsmouth to Skoczow | 877.22 mi (1,411.74 km) |
| Portsmouth to Skwierzyna | 719.32 mi (1,157.64 km) |
| Portsmouth to Slawno | 782.58 mi (1,259.43 km) |
| Portsmouth to Slubice | 679.18 mi (1,093.03 km) |
| Portsmouth to Slupca | 818.41 mi (1,317.10 km) |
| Portsmouth to Slupsk | 797.97 mi (1,284.22 km) |
| Portsmouth to Sochaczew | 918.55 mi (1,478.27 km) |
| Portsmouth to Sokolka | 1,053.31 mi (1,695.13 km) |
| Portsmouth to Sokolow Podlaski | 1,003.11 mi (1,614.35 km) |
| Portsmouth to Solec Kujawski | 835.09 mi (1,343.95 km) |
| Portsmouth to Sopot | 858.60 mi (1,381.78 km) |
