| Romeoville to Senftenberg | 4,491.96 mi (7,229.12 km) |
| Romeoville to Siegburg | 4,276.17 mi (6,881.83 km) |
| Romeoville to Siegen | 4,302.94 mi (6,924.91 km) |
| Romeoville to Sigmaringen | 4,455.28 mi (7,170.08 km) |
| Romeoville to Simbach am Inn | 4,590.00 mi (7,386.89 km) |
| Romeoville to Simmerath | 4,250.10 mi (6,839.88 km) |
| Romeoville to Sindelfingen | 4,422.64 mi (7,117.55 km) |
| Romeoville to Sinsheim | 4,397.29 mi (7,076.75 km) |
| Romeoville to Sinzheim | 4,389.23 mi (7,063.79 km) |
| Romeoville to Sinzig | 4,287.44 mi (6,899.96 km) |
| Romeoville to Soest | 4,280.57 mi (6,888.92 km) |
| Romeoville to Solingen | 4,258.21 mi (6,852.93 km) |
| Romeoville to Soltau | 4,288.84 mi (6,902.21 km) |
| Romeoville to Sommerda | 4,404.24 mi (7,087.94 km) |
| Romeoville to Sondershausen | 4,387.30 mi (7,060.68 km) |
