| Port Neches to Silver Firs (Washington) | 1,936.99 mi (3,117.29 km) |
| Port Neches to Silver Spring (Maryland) | 1,145.06 mi (1,842.79 km) |
| Port Neches to Silver Springs Shores (Florida) | 719.32 mi (1,157.63 km) |
| Port Neches to Silverdale (Washington) | 1,952.08 mi (3,141.58 km) |
| Port Neches to Silverton (Oregon) | 1,875.44 mi (3,018.23 km) |
| Port Neches to Simi Valley (California) | 1,477.44 mi (2,377.71 km) |
| Port Neches to Simpsonville (South Carolina) | 756.47 mi (1,217.42 km) |
| Port Neches to Sioux City (Iowa) | 875.56 mi (1,409.07 km) |
| Port Neches to Sioux Falls (South Dakota) | 949.56 mi (1,528.17 km) |
| Port Neches to Skokie (Illinois) | 901.89 mi (1,451.45 km) |
| Port Neches to Sleepy Hollow (New York) | 1,359.88 mi (2,188.52 km) |
| Port Neches to Slidell (Louisiana) | 249.69 mi (401.84 km) |
| Port Neches to Smithfield (North Carolina) | 982.30 mi (1,580.86 km) |
| Port Neches to Smithfield (Utah) | 1,288.65 mi (2,073.89 km) |
| Port Neches to Smithville (Missouri) | 651.52 mi (1,048.51 km) |
