| Poplar Bluff to Sierpc | 4,965.30 mi (7,990.88 km) |
| Poplar Bluff to Skarzysko-Kamienna | 5,082.66 mi (8,179.75 km) |
| Poplar Bluff to Skawina | 5,094.49 mi (8,198.79 km) |
| Poplar Bluff to Skierniewice | 5,020.29 mi (8,079.37 km) |
| Poplar Bluff to Skoczow | 5,065.71 mi (8,152.47 km) |
| Poplar Bluff to Skwierzyna | 4,836.40 mi (7,783.43 km) |
| Poplar Bluff to Slawno | 4,806.16 mi (7,734.76 km) |
| Poplar Bluff to Slubice | 4,813.91 mi (7,747.24 km) |
| Poplar Bluff to Slupca | 4,929.38 mi (7,933.07 km) |
| Poplar Bluff to Slupsk | 4,813.49 mi (7,746.56 km) |
| Poplar Bluff to Sochaczew | 5,011.68 mi (8,065.51 km) |
| Poplar Bluff to Sokolka | 5,066.54 mi (8,153.81 km) |
| Poplar Bluff to Sokolow Podlaski | 5,070.78 mi (8,160.63 km) |
| Poplar Bluff to Solec Kujawski | 4,909.42 mi (7,900.96 km) |
| Poplar Bluff to Sopot | 4,864.13 mi (7,828.06 km) |
