| Glenn Dale to Sesimbra | 3,560.34 mi (5,729.81 km) |
| Glenn Dale to Setubal | 3,568.42 mi (5,742.81 km) |
| Glenn Dale to Sever do Vouga | 3,535.63 mi (5,690.05 km) |
| Glenn Dale to Silves | 3,628.43 mi (5,839.39 km) |
| Glenn Dale to Sines | 3,585.52 mi (5,770.33 km) |
| Glenn Dale to Sintra | 3,536.37 mi (5,691.23 km) |
| Glenn Dale to Sobrado de Paiva | 3,532.79 mi (5,685.48 km) |
| Glenn Dale to Sobral de Monte Agraco | 3,542.20 mi (5,700.62 km) |
| Glenn Dale to Soure | 3,540.38 mi (5,697.69 km) |
| Glenn Dale to Tabua | 3,561.74 mi (5,732.07 km) |
| Glenn Dale to Tavira | 3,669.95 mi (5,906.22 km) |
| Glenn Dale to Tomar | 3,562.89 mi (5,733.91 km) |
| Glenn Dale to Tondela | 3,555.02 mi (5,721.25 km) |
| Glenn Dale to Torre de Moncorvo | 3,583.25 mi (5,766.68 km) |
| Glenn Dale to Torres Novas | 3,560.71 mi (5,730.41 km) |
