| Guardiagrele to Silver Firs (Washington) | 5,668.75 mi (9,122.97 km) |
| Guardiagrele to Silver Spring (Maryland) | 4,544.61 mi (7,313.85 km) |
| Guardiagrele to Silver Springs Shores (Florida) | 5,191.27 mi (8,354.54 km) |
| Guardiagrele to Silverdale (Washington) | 5,693.16 mi (9,162.25 km) |
| Guardiagrele to Silverton (Oregon) | 5,853.93 mi (9,421.00 km) |
| Guardiagrele to Simi Valley (California) | 6,373.07 mi (10,256.47 km) |
| Guardiagrele to Simpsonville (South Carolina) | 4,953.83 mi (7,972.43 km) |
| Guardiagrele to Sioux City (Iowa) | 5,170.88 mi (8,321.73 km) |
| Guardiagrele to Sioux Falls (South Dakota) | 5,133.10 mi (8,260.93 km) |
| Guardiagrele to Skokie (Illinois) | 4,862.73 mi (7,825.81 km) |
| Guardiagrele to Sleepy Hollow (New York) | 4,325.53 mi (6,961.27 km) |
| Guardiagrele to Slidell (Louisiana) | 5,485.65 mi (8,828.30 km) |
| Guardiagrele to Smithfield (North Carolina) | 4,746.93 mi (7,639.45 km) |
| Guardiagrele to Smithfield (Utah) | 5,729.18 mi (9,220.23 km) |
| Guardiagrele to Smithville (Missouri) | 5,251.31 mi (8,451.16 km) |
