| Harwich to Sierpc | 776.19 mi (1,249.15 km) |
| Harwich to Skarzysko-Kamienna | 844.04 mi (1,358.35 km) |
| Harwich to Skawina | 816.90 mi (1,314.67 km) |
| Harwich to Skierniewice | 801.92 mi (1,290.56 km) |
| Harwich to Skoczow | 776.16 mi (1,249.11 km) |
| Harwich to Skwierzyna | 602.64 mi (969.85 km) |
| Harwich to Slawno | 658.67 mi (1,060.03 km) |
| Harwich to Slubice | 563.92 mi (907.55 km) |
| Harwich to Slupca | 703.22 mi (1,131.73 km) |
| Harwich to Slupsk | 673.86 mi (1,084.47 km) |
| Harwich to Sochaczew | 803.29 mi (1,292.77 km) |
| Harwich to Sokolka | 933.28 mi (1,501.97 km) |
| Harwich to Sokolow Podlaski | 886.74 mi (1,427.07 km) |
| Harwich to Solec Kujawski | 716.22 mi (1,152.65 km) |
| Harwich to Sopot | 734.93 mi (1,182.75 km) |
