| Swansea to Sierpc | 4,852.47 mi (7,809.29 km) |
| Swansea to Skarzysko-Kamienna | 4,970.76 mi (7,999.66 km) |
| Swansea to Skawina | 4,983.99 mi (8,020.96 km) |
| Swansea to Skierniewice | 4,908.01 mi (7,898.68 km) |
| Swansea to Skoczow | 4,955.83 mi (7,975.64 km) |
| Swansea to Skwierzyna | 4,725.41 mi (7,604.81 km) |
| Swansea to Slawno | 4,693.21 mi (7,552.99 km) |
| Swansea to Slubice | 4,703.51 mi (7,569.57 km) |
| Swansea to Slupca | 4,817.72 mi (7,753.38 km) |
| Swansea to Slupsk | 4,700.32 mi (7,564.44 km) |
| Swansea to Sochaczew | 4,899.15 mi (7,884.41 km) |
| Swansea to Sokolka | 4,951.88 mi (7,969.28 km) |
| Swansea to Sokolow Podlaski | 4,957.33 mi (7,978.06 km) |
| Swansea to Solec Kujawski | 4,796.97 mi (7,719.98 km) |
| Swansea to Sopot | 4,750.44 mi (7,645.09 km) |
