| Niksar to Silver Firs (Washington) | 6,193.19 mi (9,966.98 km) |
| Niksar to Silver Spring (Maryland) | 5,544.14 mi (8,922.43 km) |
| Niksar to Silver Springs Shores (Florida) | 6,238.11 mi (10,039.27 km) |
| Niksar to Silverdale (Washington) | 6,212.94 mi (9,998.76 km) |
| Niksar to Silverton (Oregon) | 6,391.68 mi (10,286.42 km) |
| Niksar to Simi Valley (California) | 7,039.04 mi (11,328.25 km) |
| Niksar to Simpsonville (South Carolina) | 5,957.39 mi (9,587.50 km) |
| Niksar to Sioux City (Iowa) | 6,000.43 mi (9,656.76 km) |
| Niksar to Sioux Falls (South Dakota) | 5,949.79 mi (9,575.26 km) |
| Niksar to Skokie (Illinois) | 5,764.36 mi (9,276.84 km) |
| Niksar to Sleepy Hollow (New York) | 5,324.08 mi (8,568.28 km) |
| Niksar to Slidell (Louisiana) | 6,472.96 mi (10,417.23 km) |
| Niksar to Smithfield (North Carolina) | 5,767.89 mi (9,282.51 km) |
| Niksar to Smithfield (Utah) | 6,416.67 mi (10,326.64 km) |
| Niksar to Smithville (Missouri) | 6,124.86 mi (9,857.01 km) |
