| Robstown to Silver Firs (Washington) | 1,909.37 mi (3,072.84 km) |
| Robstown to Silver Spring (Maryland) | 1,415.38 mi (2,277.83 km) |
| Robstown to Silver Springs Shores (Florida) | 954.60 mi (1,536.28 km) |
| Robstown to Silverdale (Washington) | 1,920.84 mi (3,091.29 km) |
| Robstown to Silverton (Oregon) | 1,820.50 mi (2,929.81 km) |
| Robstown to Simi Valley (California) | 1,322.66 mi (2,128.61 km) |
| Robstown to Simpsonville (South Carolina) | 1,026.98 mi (1,652.77 km) |
| Robstown to Sioux City (Iowa) | 1,018.33 mi (1,638.85 km) |
| Robstown to Sioux Falls (South Dakota) | 1,089.17 mi (1,752.85 km) |
| Robstown to Skokie (Illinois) | 1,131.59 mi (1,821.11 km) |
| Robstown to Sleepy Hollow (New York) | 1,629.25 mi (2,622.03 km) |
| Robstown to Slidell (Louisiana) | 506.46 mi (815.07 km) |
| Robstown to Smithfield (North Carolina) | 1,252.21 mi (2,015.23 km) |
| Robstown to Smithfield (Utah) | 1,255.82 mi (2,021.05 km) |
| Robstown to Smithville (Missouri) | 820.74 mi (1,320.85 km) |
