| Estoril to Siran | 2,558.39 mi (4,117.33 km) |
| Estoril to Sirnak | 2,781.74 mi (4,476.79 km) |
| Estoril to Sirvan | 2,747.80 mi (4,422.16 km) |
| Estoril to Sivas | 2,457.05 mi (3,954.24 km) |
| Estoril to Sivasli | 2,094.21 mi (3,370.31 km) |
| Estoril to Siverek | 2,613.07 mi (4,205.33 km) |
| Estoril to Sivrice | 2,599.09 mi (4,182.83 km) |
| Estoril to Sivrihisar | 2,177.16 mi (3,503.80 km) |
| Estoril to Sogut | 2,098.82 mi (3,377.73 km) |
| Estoril to Sogutlu | 2,104.08 mi (3,386.18 km) |
| Estoril to Soke | 1,985.42 mi (3,195.22 km) |
| Estoril to Solhan | 2,679.33 mi (4,311.96 km) |
| Estoril to Soma | 1,974.92 mi (3,178.32 km) |
| Estoril to Sorgun | 2,361.62 mi (3,800.66 km) |
| Estoril to Suhut | 2,138.91 mi (3,442.25 km) |
