| Rockford to Sinop | 5,658.03 mi (9,105.73 km) |
| Rockford to Siran | 5,883.85 mi (9,469.15 km) |
| Rockford to Sirnak | 6,137.50 mi (9,877.36 km) |
| Rockford to Sirvan | 6,093.20 mi (9,806.06 km) |
| Rockford to Sivas | 5,842.13 mi (9,401.99 km) |
| Rockford to Sivasli | 5,662.96 mi (9,113.65 km) |
| Rockford to Siverek | 6,026.82 mi (9,699.24 km) |
| Rockford to Sivrice | 5,987.49 mi (9,635.93 km) |
| Rockford to Sivrihisar | 5,676.84 mi (9,135.99 km) |
| Rockford to Sogut | 5,600.20 mi (9,012.65 km) |
| Rockford to Sogutlu | 5,564.46 mi (8,955.13 km) |
| Rockford to Soke | 5,618.96 mi (9,042.84 km) |
| Rockford to Solhan | 6,011.90 mi (9,675.22 km) |
| Rockford to Soma | 5,552.47 mi (8,935.84 km) |
| Rockford to Sorgun | 5,779.61 mi (9,301.39 km) |
