| Guyancourt to Setubal | 893.56 mi (1,438.04 km) |
| Guyancourt to Sever do Vouga | 754.20 mi (1,213.77 km) |
| Guyancourt to Silves | 958.75 mi (1,542.97 km) |
| Guyancourt to Sines | 925.59 mi (1,489.59 km) |
| Guyancourt to Sintra | 893.31 mi (1,437.65 km) |
| Guyancourt to Sobrado de Paiva | 734.88 mi (1,182.68 km) |
| Guyancourt to Sobral de Monte Agraco | 873.62 mi (1,405.95 km) |
| Guyancourt to Soure | 799.94 mi (1,287.37 km) |
| Guyancourt to Tabua | 763.55 mi (1,228.82 km) |
| Guyancourt to Tavira | 941.83 mi (1,515.73 km) |
| Guyancourt to Tomar | 818.00 mi (1,316.45 km) |
| Guyancourt to Tondela | 756.70 mi (1,217.79 km) |
| Guyancourt to Torre de Moncorvo | 689.00 mi (1,108.84 km) |
| Guyancourt to Torres Novas | 829.11 mi (1,334.32 km) |
| Guyancourt to Torres Vedras | 873.60 mi (1,405.92 km) |
