| Ashburn to Sesimbra | 3,592.31 mi (5,781.26 km) |
| Ashburn to Setubal | 3,600.34 mi (5,794.19 km) |
| Ashburn to Sever do Vouga | 3,566.71 mi (5,740.06 km) |
| Ashburn to Silves | 3,660.73 mi (5,891.38 km) |
| Ashburn to Sines | 3,617.63 mi (5,822.01 km) |
| Ashburn to Sintra | 3,568.25 mi (5,742.55 km) |
| Ashburn to Sobrado de Paiva | 3,563.74 mi (5,735.29 km) |
| Ashburn to Sobral de Monte Agraco | 3,573.98 mi (5,751.77 km) |
| Ashburn to Soure | 3,571.73 mi (5,748.15 km) |
| Ashburn to Tabua | 3,592.92 mi (5,782.24 km) |
| Ashburn to Tavira | 3,702.19 mi (5,958.10 km) |
| Ashburn to Tomar | 3,594.38 mi (5,784.60 km) |
| Ashburn to Tondela | 3,586.14 mi (5,771.34 km) |
| Ashburn to Torre de Moncorvo | 3,614.00 mi (5,816.17 km) |
| Ashburn to Torres Novas | 3,592.27 mi (5,781.20 km) |
