| Llanelli to Sierpc | 1,005.98 mi (1,618.96 km) |
| Llanelli to Skarzysko-Kamienna | 1,076.46 mi (1,732.40 km) |
| Llanelli to Skawina | 1,048.90 mi (1,688.05 km) |
| Llanelli to Skierniewice | 1,033.60 mi (1,663.41 km) |
| Llanelli to Skoczow | 1,007.64 mi (1,621.65 km) |
| Llanelli to Skwierzyna | 833.56 mi (1,341.49 km) |
| Llanelli to Slawno | 882.07 mi (1,419.55 km) |
| Llanelli to Slubice | 795.52 mi (1,280.26 km) |
| Llanelli to Slupca | 934.61 mi (1,504.11 km) |
| Llanelli to Slupsk | 896.75 mi (1,443.18 km) |
| Llanelli to Sochaczew | 1,034.51 mi (1,664.88 km) |
| Llanelli to Sokolka | 1,161.07 mi (1,868.57 km) |
| Llanelli to Sokolow Podlaski | 1,117.34 mi (1,798.18 km) |
| Llanelli to Solec Kujawski | 945.53 mi (1,521.69 km) |
| Llanelli to Sopot | 958.36 mi (1,542.34 km) |
