| Williamsport to Sesimbra | 3,514.77 mi (5,656.48 km) |
| Williamsport to Setubal | 3,522.38 mi (5,668.73 km) |
| Williamsport to Sever do Vouga | 3,482.34 mi (5,604.28 km) |
| Williamsport to Silves | 3,585.92 mi (5,770.97 km) |
| Williamsport to Sines | 3,541.18 mi (5,698.98 km) |
| Williamsport to Sintra | 3,490.03 mi (5,616.67 km) |
| Williamsport to Sobrado de Paiva | 3,478.48 mi (5,598.08 km) |
| Williamsport to Sobral de Monte Agraco | 3,494.94 mi (5,624.56 km) |
| Williamsport to Soure | 3,489.43 mi (5,615.69 km) |
| Williamsport to Tabua | 3,509.24 mi (5,647.57 km) |
| Williamsport to Tavira | 3,626.74 mi (5,836.68 km) |
| Williamsport to Tomar | 3,513.08 mi (5,653.76 km) |
| Williamsport to Tondela | 3,502.10 mi (5,636.08 km) |
| Williamsport to Torre de Moncorvo | 3,527.33 mi (5,676.69 km) |
| Williamsport to Torres Novas | 3,511.43 mi (5,651.11 km) |
