| Morro Bay to Silver Firs (Washington) | 865.92 mi (1,393.56 km) |
| Morro Bay to Silver Spring (Maryland) | 2,402.30 mi (3,866.13 km) |
| Morro Bay to Silver Springs Shores (Florida) | 2,295.23 mi (3,693.82 km) |
| Morro Bay to Silverdale (Washington) | 854.93 mi (1,375.88 km) |
| Morro Bay to Silverton (Oregon) | 673.41 mi (1,083.75 km) |
| Morro Bay to Simi Valley (California) | 141.33 mi (227.45 km) |
| Morro Bay to Simpsonville (South Carolina) | 2,169.31 mi (3,491.17 km) |
| Morro Bay to Sioux City (Iowa) | 1,397.69 mi (2,249.36 km) |
| Morro Bay to Sioux Falls (South Dakota) | 1,398.47 mi (2,250.62 km) |
| Morro Bay to Skokie (Illinois) | 1,831.26 mi (2,947.12 km) |
| Morro Bay to Sleepy Hollow (New York) | 2,548.97 mi (4,102.18 km) |
| Morro Bay to Slidell (Louisiana) | 1,829.64 mi (2,944.52 km) |
| Morro Bay to Smithfield (North Carolina) | 2,373.24 mi (3,819.37 km) |
| Morro Bay to Smithfield (Utah) | 660.32 mi (1,062.68 km) |
| Morro Bay to Smithville (Missouri) | 1,463.61 mi (2,355.46 km) |
