| Niles to Silver Firs (Washington) | 1,711.82 mi (2,754.90 km) |
| Niles to Silver Spring (Maryland) | 603.51 mi (971.25 km) |
| Niles to Silver Springs Shores (Florida) | 949.31 mi (1,527.77 km) |
| Niles to Silverdale (Washington) | 1,736.49 mi (2,794.61 km) |
| Niles to Silverton (Oregon) | 1,750.50 mi (2,817.16 km) |
| Niles to Simi Valley (California) | 1,753.53 mi (2,822.03 km) |
| Niles to Simpsonville (South Carolina) | 586.88 mi (944.48 km) |
| Niles to Sioux City (Iowa) | 439.75 mi (707.70 km) |
| Niles to Sioux Falls (South Dakota) | 464.04 mi (746.80 km) |
| Niles to Skokie (Illinois) | 3.63 mi (5.84 km) |
| Niles to Sleepy Hollow (New York) | 722.65 mi (1,162.99 km) |
| Niles to Slidell (Louisiana) | 818.46 mi (1,317.18 km) |
| Niles to Smithfield (North Carolina) | 679.16 mi (1,093.01 km) |
| Niles to Smithfield (Utah) | 1,230.49 mi (1,980.29 km) |
| Niles to Smithville (Missouri) | 398.20 mi (640.84 km) |
