| Civita Castellana to Silver Firs (Washington) | 5,618.97 mi (9,042.86 km) |
| Civita Castellana to Silver Spring (Maryland) | 4,462.07 mi (7,181.00 km) |
| Civita Castellana to Silver Springs Shores (Florida) | 5,105.00 mi (8,215.70 km) |
| Civita Castellana to Silverdale (Washington) | 5,643.65 mi (9,082.58 km) |
| Civita Castellana to Silverton (Oregon) | 5,802.63 mi (9,338.43 km) |
| Civita Castellana to Simi Valley (California) | 6,311.11 mi (10,156.75 km) |
| Civita Castellana to Simpsonville (South Carolina) | 4,870.60 mi (7,838.48 km) |
| Civita Castellana to Sioux City (Iowa) | 5,099.66 mi (8,207.11 km) |
| Civita Castellana to Sioux Falls (South Dakota) | 5,062.89 mi (8,147.94 km) |
| Civita Castellana to Skokie (Illinois) | 4,786.79 mi (7,703.60 km) |
| Civita Castellana to Sleepy Hollow (New York) | 4,243.29 mi (6,828.92 km) |
| Civita Castellana to Slidell (Louisiana) | 5,403.01 mi (8,695.31 km) |
| Civita Castellana to Smithfield (North Carolina) | 4,662.71 mi (7,503.91 km) |
| Civita Castellana to Smithfield (Utah) | 5,667.16 mi (9,120.41 km) |
| Civita Castellana to Smithville (Missouri) | 5,176.78 mi (8,331.23 km) |
