| Rockford to Senftenberg | 4,492.96 mi (7,230.72 km) |
| Rockford to Siegburg | 4,281.05 mi (6,889.69 km) |
| Rockford to Siegen | 4,307.37 mi (6,932.04 km) |
| Rockford to Sigmaringen | 4,462.10 mi (7,181.06 km) |
| Rockford to Simbach am Inn | 4,594.75 mi (7,394.54 km) |
| Rockford to Simmerath | 4,255.61 mi (6,848.74 km) |
| Rockford to Sindelfingen | 4,428.92 mi (7,127.65 km) |
| Rockford to Sinsheim | 4,403.06 mi (7,086.04 km) |
| Rockford to Sinzheim | 4,395.86 mi (7,074.45 km) |
| Rockford to Sinzig | 4,292.58 mi (6,908.24 km) |
| Rockford to Soest | 4,284.22 mi (6,894.78 km) |
| Rockford to Solingen | 4,262.75 mi (6,860.24 km) |
| Rockford to Soltau | 4,290.19 mi (6,904.40 km) |
| Rockford to Sommerda | 4,406.96 mi (7,092.32 km) |
| Rockford to Sondershausen | 4,389.92 mi (7,064.89 km) |
