| Duncan to Sierpc | 5,332.47 mi (8,581.78 km) |
| Duncan to Skarzysko-Kamienna | 5,453.75 mi (8,776.96 km) |
| Duncan to Skawina | 5,471.40 mi (8,805.36 km) |
| Duncan to Skierniewice | 5,389.84 mi (8,674.11 km) |
| Duncan to Skoczow | 5,445.10 mi (8,763.04 km) |
| Duncan to Skwierzyna | 5,211.72 mi (8,387.46 km) |
| Duncan to Slawno | 5,173.07 mi (8,325.26 km) |
| Duncan to Slubice | 5,191.64 mi (8,355.14 km) |
| Duncan to Slupca | 5,301.80 mi (8,532.43 km) |
| Duncan to Slupsk | 5,179.41 mi (8,335.45 km) |
| Duncan to Sochaczew | 5,380.14 mi (8,658.50 km) |
| Duncan to Sokolka | 5,424.69 mi (8,730.19 km) |
| Duncan to Sokolow Podlaski | 5,434.90 mi (8,746.63 km) |
| Duncan to Solec Kujawski | 5,278.40 mi (8,494.77 km) |
| Duncan to Sopot | 5,227.48 mi (8,412.82 km) |
