| Widnes to Sierpc | 925.32 mi (1,489.16 km) |
| Widnes to Skarzysko-Kamienna | 1,007.58 mi (1,621.55 km) |
| Widnes to Skawina | 989.97 mi (1,593.20 km) |
| Widnes to Skierniewice | 959.34 mi (1,543.91 km) |
| Widnes to Skoczow | 951.95 mi (1,532.02 km) |
| Widnes to Skwierzyna | 758.03 mi (1,219.93 km) |
| Widnes to Slawno | 791.09 mi (1,273.13 km) |
| Widnes to Slubice | 723.12 mi (1,163.74 km) |
| Widnes to Slupca | 859.81 mi (1,383.73 km) |
| Widnes to Slupsk | 804.95 mi (1,295.44 km) |
| Widnes to Sochaczew | 958.22 mi (1,542.10 km) |
| Widnes to Sokolka | 1,074.82 mi (1,729.76 km) |
| Widnes to Sokolow Podlaski | 1,038.25 mi (1,670.91 km) |
| Widnes to Solec Kujawski | 864.19 mi (1,390.77 km) |
| Widnes to Sopot | 866.67 mi (1,394.77 km) |
