| Sulphur to Siloam Springs (Arkansas) | 417.06 mi (671.20 km) |
| Sulphur to Silver Firs (Washington) | 1,948.14 mi (3,135.23 km) |
| Sulphur to Silver Spring (Maryland) | 1,106.52 mi (1,780.77 km) |
| Sulphur to Silver Springs Shores (Florida) | 684.95 mi (1,102.32 km) |
| Sulphur to Silverdale (Washington) | 1,963.71 mi (3,160.28 km) |
| Sulphur to Silverton (Oregon) | 1,890.43 mi (3,042.35 km) |
| Sulphur to Simi Valley (California) | 1,505.71 mi (2,423.21 km) |
| Sulphur to Simpsonville (South Carolina) | 717.20 mi (1,154.23 km) |
| Sulphur to Sioux City (Iowa) | 864.06 mi (1,390.57 km) |
| Sulphur to Sioux Falls (South Dakota) | 938.19 mi (1,509.87 km) |
| Sulphur to Skokie (Illinois) | 873.41 mi (1,405.62 km) |
| Sulphur to Sleepy Hollow (New York) | 1,321.68 mi (2,127.04 km) |
| Sulphur to Slidell (Louisiana) | 213.32 mi (343.30 km) |
| Sulphur to Smithfield (North Carolina) | 943.01 mi (1,517.62 km) |
| Sulphur to Smithfield (Utah) | 1,302.09 mi (2,095.52 km) |
