| Upminster to Sierpc | 824.39 mi (1,326.72 km) |
| Upminster to Skarzysko-Kamienna | 889.59 mi (1,431.66 km) |
| Upminster to Skawina | 859.92 mi (1,383.91 km) |
| Upminster to Skierniewice | 848.78 mi (1,365.98 km) |
| Upminster to Skoczow | 818.34 mi (1,316.99 km) |
| Upminster to Skwierzyna | 650.30 mi (1,046.55 km) |
| Upminster to Slawno | 708.65 mi (1,140.47 km) |
| Upminster to Slubice | 611.05 mi (983.39 km) |
| Upminster to Slupca | 750.43 mi (1,207.70 km) |
| Upminster to Slupsk | 723.90 mi (1,165.00 km) |
| Upminster to Sochaczew | 850.58 mi (1,368.87 km) |
| Upminster to Sokolka | 982.17 mi (1,580.65 km) |
| Upminster to Sokolow Podlaski | 934.44 mi (1,503.83 km) |
| Upminster to Solec Kujawski | 764.68 mi (1,230.63 km) |
| Upminster to Sopot | 784.85 mi (1,263.10 km) |
