| Fort Collins to Senftenberg | 5,098.89 mi (8,205.87 km) |
| Fort Collins to Siegburg | 4,921.44 mi (7,920.29 km) |
| Fort Collins to Siegen | 4,943.85 mi (7,956.36 km) |
| Fort Collins to Sigmaringen | 5,115.43 mi (8,232.48 km) |
| Fort Collins to Simbach am Inn | 5,230.29 mi (8,417.34 km) |
| Fort Collins to Simmerath | 4,901.19 mi (7,887.70 km) |
| Fort Collins to Sindelfingen | 5,078.40 mi (8,172.89 km) |
| Fort Collins to Sinsheim | 5,048.92 mi (8,125.45 km) |
| Fort Collins to Sinzheim | 5,048.41 mi (8,124.63 km) |
| Fort Collins to Sinzig | 4,934.84 mi (7,941.86 km) |
| Fort Collins to Soest | 4,914.71 mi (7,909.46 km) |
| Fort Collins to Solingen | 4,900.65 mi (7,886.83 km) |
| Fort Collins to Soltau | 4,901.90 mi (7,888.84 km) |
| Fort Collins to Sommerda | 5,028.37 mi (8,092.38 km) |
| Fort Collins to Sondershausen | 5,010.73 mi (8,063.99 km) |
