| Gaithersburg to Sierpc | 4,382.94 mi (7,053.66 km) |
| Gaithersburg to Skarzysko-Kamienna | 4,491.84 mi (7,228.91 km) |
| Gaithersburg to Skawina | 4,492.97 mi (7,230.74 km) |
| Gaithersburg to Skierniewice | 4,432.95 mi (7,134.15 km) |
| Gaithersburg to Skoczow | 4,459.96 mi (7,177.62 km) |
| Gaithersburg to Skwierzyna | 4,240.53 mi (6,824.48 km) |
| Gaithersburg to Slawno | 4,226.19 mi (6,801.39 km) |
| Gaithersburg to Slubice | 4,213.84 mi (6,781.52 km) |
| Gaithersburg to Slupca | 4,337.82 mi (6,981.04 km) |
| Gaithersburg to Slupsk | 4,235.27 mi (6,816.00 km) |
| Gaithersburg to Sochaczew | 4,426.42 mi (7,123.64 km) |
| Gaithersburg to Sokolka | 4,499.33 mi (7,240.98 km) |
| Gaithersburg to Sokolow Podlaski | 4,492.73 mi (7,230.34 km) |
| Gaithersburg to Solec Kujawski | 4,324.42 mi (6,959.48 km) |
| Gaithersburg to Sopot | 4,289.99 mi (6,904.06 km) |
