| Ferentino to Silver Firs (Washington) | 5,676.81 mi (9,135.94 km) |
| Ferentino to Silver Spring (Maryland) | 4,520.84 mi (7,275.59 km) |
| Ferentino to Silver Springs Shores (Florida) | 5,162.08 mi (8,307.57 km) |
| Ferentino to Silverdale (Washington) | 5,701.43 mi (9,175.57 km) |
| Ferentino to Silverton (Oregon) | 5,860.81 mi (9,432.06 km) |
| Ferentino to Simi Valley (California) | 6,371.06 mi (10,253.23 km) |
| Ferentino to Simpsonville (South Carolina) | 4,929.13 mi (7,932.66 km) |
| Ferentino to Sioux City (Iowa) | 5,160.10 mi (8,304.37 km) |
| Ferentino to Sioux Falls (South Dakota) | 5,123.33 mi (8,245.21 km) |
| Ferentino to Skokie (Illinois) | 4,846.95 mi (7,800.41 km) |
| Ferentino to Sleepy Hollow (New York) | 4,302.17 mi (6,923.68 km) |
| Ferentino to Slidell (Louisiana) | 5,461.73 mi (8,789.80 km) |
| Ferentino to Smithfield (North Carolina) | 4,720.84 mi (7,597.46 km) |
| Ferentino to Smithfield (Utah) | 5,727.11 mi (9,216.89 km) |
| Ferentino to Smithville (Missouri) | 5,237.07 mi (8,428.25 km) |
