| Galveston to Sesimbra | 4,786.24 mi (7,702.71 km) |
| Galveston to Setubal | 4,794.61 mi (7,716.18 km) |
| Galveston to Sever do Vouga | 4,765.15 mi (7,668.77 km) |
| Galveston to Silves | 4,852.08 mi (7,808.66 km) |
| Galveston to Sines | 4,810.57 mi (7,741.87 km) |
| Galveston to Sintra | 4,762.78 mi (7,664.95 km) |
| Galveston to Sobrado de Paiva | 4,762.58 mi (7,664.63 km) |
| Galveston to Sobral de Monte Agraco | 4,769.14 mi (7,675.18 km) |
| Galveston to Soure | 4,769.08 mi (7,675.10 km) |
| Galveston to Tabua | 4,791.00 mi (7,710.37 km) |
| Galveston to Tavira | 4,894.08 mi (7,876.25 km) |
| Galveston to Tomar | 4,791.10 mi (7,710.52 km) |
| Galveston to Tondela | 4,784.42 mi (7,699.78 km) |
| Galveston to Torre de Moncorvo | 4,813.35 mi (7,746.35 km) |
| Galveston to Torres Novas | 4,788.68 mi (7,706.64 km) |
