| Alton to Silver Firs (Washington) | 4,761.91 mi (7,663.56 km) |
| Alton to Silver Spring (Maryland) | 3,632.66 mi (5,846.20 km) |
| Alton to Silver Springs Shores (Florida) | 4,307.05 mi (6,931.52 km) |
| Alton to Silverdale (Washington) | 4,787.26 mi (7,704.35 km) |
| Alton to Silverton (Oregon) | 4,941.58 mi (7,952.71 km) |
| Alton to Simi Valley (California) | 5,433.65 mi (8,744.62 km) |
| Alton to Simpsonville (South Carolina) | 4,045.07 mi (6,509.91 km) |
| Alton to Sioux City (Iowa) | 4,225.28 mi (6,799.93 km) |
| Alton to Sioux Falls (South Dakota) | 4,187.15 mi (6,738.57 km) |
| Alton to Skokie (Illinois) | 3,923.47 mi (6,314.21 km) |
| Alton to Sleepy Hollow (New York) | 3,412.37 mi (5,491.69 km) |
| Alton to Slidell (Louisiana) | 4,571.68 mi (7,357.41 km) |
| Alton to Smithfield (North Carolina) | 3,846.16 mi (6,189.79 km) |
| Alton to Smithfield (Utah) | 4,789.77 mi (7,708.39 km) |
| Alton to Smithville (Missouri) | 4,309.10 mi (6,934.83 km) |
