| Willimantic to Sierpc | 4,072.64 mi (6,554.27 km) |
| Willimantic to Skarzysko-Kamienna | 4,180.08 mi (6,727.19 km) |
| Willimantic to Skawina | 4,179.72 mi (6,726.61 km) |
| Willimantic to Skierniewice | 4,121.80 mi (6,633.40 km) |
| Willimantic to Skoczow | 4,146.20 mi (6,672.66 km) |
| Willimantic to Skwierzyna | 3,928.35 mi (6,322.06 km) |
| Willimantic to Slawno | 3,916.51 mi (6,303.01 km) |
| Willimantic to Slubice | 3,901.08 mi (6,278.19 km) |
| Willimantic to Slupca | 4,026.15 mi (6,479.46 km) |
| Willimantic to Slupsk | 3,925.86 mi (6,318.07 km) |
| Willimantic to Sochaczew | 4,115.60 mi (6,623.42 km) |
| Willimantic to Sokolka | 4,191.40 mi (6,745.40 km) |
| Willimantic to Sokolow Podlaski | 4,182.96 mi (6,731.82 km) |
| Willimantic to Solec Kujawski | 4,013.77 mi (6,459.54 km) |
| Willimantic to Sopot | 3,981.19 mi (6,407.11 km) |
