| Boulder to Senftenberg | 5,134.26 mi (8,262.79 km) |
| Boulder to Siegburg | 4,955.96 mi (7,975.84 km) |
| Boulder to Siegen | 4,978.48 mi (8,012.08 km) |
| Boulder to Sigmaringen | 5,149.64 mi (8,287.55 km) |
| Boulder to Simbach am Inn | 5,265.02 mi (8,473.22 km) |
| Boulder to Simmerath | 4,935.56 mi (7,943.02 km) |
| Boulder to Sindelfingen | 5,112.71 mi (8,228.12 km) |
| Boulder to Sinsheim | 5,083.33 mi (8,180.82 km) |
| Boulder to Sinzheim | 5,082.63 mi (8,179.70 km) |
| Boulder to Sinzig | 4,969.31 mi (7,997.34 km) |
| Boulder to Soest | 4,949.48 mi (7,965.42 km) |
| Boulder to Solingen | 4,935.22 mi (7,942.48 km) |
| Boulder to Soltau | 4,937.10 mi (7,945.49 km) |
| Boulder to Sommerda | 5,063.38 mi (8,148.72 km) |
| Boulder to Sondershausen | 5,045.75 mi (8,120.36 km) |
