| Rhondda to Sierpc | 976.14 mi (1,570.95 km) |
| Rhondda to Skarzysko-Kamienna | 1,045.43 mi (1,682.46 km) |
| Rhondda to Skawina | 1,017.23 mi (1,637.07 km) |
| Rhondda to Skierniewice | 1,003.06 mi (1,614.27 km) |
| Rhondda to Skoczow | 975.82 mi (1,570.43 km) |
| Rhondda to Skwierzyna | 803.32 mi (1,292.82 km) |
| Rhondda to Slawno | 853.77 mi (1,374.02 km) |
| Rhondda to Slubice | 765.00 mi (1,231.15 km) |
| Rhondda to Slupca | 904.20 mi (1,455.17 km) |
| Rhondda to Slupsk | 868.57 mi (1,397.83 km) |
| Rhondda to Sochaczew | 1,004.17 mi (1,616.06 km) |
| Rhondda to Sokolka | 1,131.84 mi (1,821.52 km) |
| Rhondda to Sokolow Podlaski | 1,087.25 mi (1,749.76 km) |
| Rhondda to Solec Kujawski | 915.83 mi (1,473.89 km) |
| Rhondda to Sopot | 930.10 mi (1,496.86 km) |
