| Westerville to Siloam Springs (Arkansas) | 686.34 mi (1,104.55 km) |
| Westerville to Silver Firs (Washington) | 1,998.36 mi (3,216.04 km) |
| Westerville to Silver Spring (Maryland) | 323.62 mi (520.82 km) |
| Westerville to Silver Springs Shores (Florida) | 762.55 mi (1,227.21 km) |
| Westerville to Silverdale (Washington) | 2,023.01 mi (3,255.72 km) |
| Westerville to Silverton (Oregon) | 2,035.20 mi (3,275.34 km) |
| Westerville to Simi Valley (California) | 1,998.94 mi (3,216.98 km) |
| Westerville to Simpsonville (South Carolina) | 374.56 mi (602.79 km) |
| Westerville to Sioux City (Iowa) | 717.14 mi (1,154.13 km) |
| Westerville to Sioux Falls (South Dakota) | 748.04 mi (1,203.86 km) |
| Westerville to Skokie (Illinois) | 283.56 mi (456.35 km) |
| Westerville to Sleepy Hollow (New York) | 479.12 mi (771.07 km) |
| Westerville to Slidell (Louisiana) | 781.59 mi (1,257.85 km) |
| Westerville to Smithfield (North Carolina) | 404.53 mi (651.02 km) |
| Westerville to Smithfield (Utah) | 1,505.25 mi (2,422.47 km) |
