| Council Bluffs to Silver Firs (Washington) | 1,365.45 mi (2,197.47 km) |
| Council Bluffs to Silver Spring (Maryland) | 1,004.80 mi (1,617.07 km) |
| Council Bluffs to Silver Springs Shores (Florida) | 1,142.69 mi (1,838.98 km) |
| Council Bluffs to Silverdale (Washington) | 1,387.69 mi (2,233.26 km) |
| Council Bluffs to Silverton (Oregon) | 1,376.15 mi (2,214.70 km) |
| Council Bluffs to Simi Valley (California) | 1,335.44 mi (2,149.18 km) |
| Council Bluffs to Simpsonville (South Carolina) | 864.69 mi (1,391.58 km) |
| Council Bluffs to Sioux City (Iowa) | 91.29 mi (146.92 km) |
| Council Bluffs to Sioux Falls (South Dakota) | 165.31 mi (266.04 km) |
| Council Bluffs to Skokie (Illinois) | 422.33 mi (679.68 km) |
| Council Bluffs to Sleepy Hollow (New York) | 1,140.23 mi (1,835.02 km) |
| Council Bluffs to Slidell (Louisiana) | 828.88 mi (1,333.95 km) |
| Council Bluffs to Smithfield (North Carolina) | 1,024.84 mi (1,649.31 km) |
| Council Bluffs to Smithfield (Utah) | 826.05 mi (1,329.40 km) |
| Council Bluffs to Smithville (Missouri) | 144.13 mi (231.96 km) |
