| Illescas to Siran | 2,245.94 mi (3,614.49 km) |
| Illescas to Sirnak | 2,470.32 mi (3,975.59 km) |
| Illescas to Sirvan | 2,436.08 mi (3,920.48 km) |
| Illescas to Sivas | 2,144.97 mi (3,451.99 km) |
| Illescas to Sivasli | 1,784.98 mi (2,872.65 km) |
| Illescas to Siverek | 2,302.13 mi (3,704.91 km) |
| Illescas to Sivrice | 2,287.56 mi (3,681.47 km) |
| Illescas to Sivrihisar | 1,866.14 mi (3,003.26 km) |
| Illescas to Sogut | 1,787.42 mi (2,876.58 km) |
| Illescas to Sogutlu | 1,791.92 mi (2,883.82 km) |
| Illescas to Soke | 1,678.48 mi (2,701.26 km) |
| Illescas to Solhan | 2,367.21 mi (3,809.66 km) |
| Illescas to Soma | 1,665.12 mi (2,679.75 km) |
| Illescas to Sorgun | 2,049.71 mi (3,298.68 km) |
| Illescas to Suhut | 1,829.34 mi (2,944.04 km) |
