| Biddeford to Sierpc | 3,924.00 mi (6,315.07 km) |
| Biddeford to Skarzysko-Kamienna | 4,032.03 mi (6,488.92 km) |
| Biddeford to Skawina | 4,032.44 mi (6,489.58 km) |
| Biddeford to Skierniewice | 3,973.49 mi (6,394.71 km) |
| Biddeford to Skoczow | 3,999.24 mi (6,436.15 km) |
| Biddeford to Skwierzyna | 3,780.48 mi (6,084.10 km) |
| Biddeford to Slawno | 3,767.65 mi (6,063.45 km) |
| Biddeford to Slubice | 3,753.51 mi (6,040.70 km) |
| Biddeford to Slupca | 3,878.05 mi (6,241.12 km) |
| Biddeford to Slupsk | 3,776.93 mi (6,078.37 km) |
| Biddeford to Sochaczew | 3,967.16 mi (6,384.52 km) |
| Biddeford to Sokolka | 4,042.07 mi (6,505.09 km) |
| Biddeford to Sokolow Podlaski | 4,034.15 mi (6,492.33 km) |
| Biddeford to Solec Kujawski | 3,865.26 mi (6,220.53 km) |
| Biddeford to Sopot | 3,832.08 mi (6,167.13 km) |
