| Portogruaro to Silver Firs (Washington) | 5,418.28 mi (8,719.89 km) |
| Portogruaro to Silver Spring (Maryland) | 4,359.73 mi (7,016.31 km) |
| Portogruaro to Silver Springs Shores (Florida) | 5,023.79 mi (8,085.01 km) |
| Portogruaro to Silverdale (Washington) | 5,442.48 mi (8,758.82 km) |
| Portogruaro to Silverton (Oregon) | 5,604.59 mi (9,019.72 km) |
| Portogruaro to Simi Valley (California) | 6,135.15 mi (9,873.57 km) |
| Portogruaro to Simpsonville (South Carolina) | 4,771.33 mi (7,678.71 km) |
| Portogruaro to Sioux City (Iowa) | 4,950.36 mi (7,966.83 km) |
| Portogruaro to Sioux Falls (South Dakota) | 4,910.41 mi (7,902.54 km) |
| Portogruaro to Skokie (Illinois) | 4,654.45 mi (7,490.61 km) |
| Portogruaro to Sleepy Hollow (New York) | 4,139.70 mi (6,662.21 km) |
| Portogruaro to Slidell (Louisiana) | 5,299.86 mi (8,529.30 km) |
| Portogruaro to Smithfield (North Carolina) | 4,569.36 mi (7,353.67 km) |
| Portogruaro to Smithfield (Utah) | 5,491.69 mi (8,838.02 km) |
| Portogruaro to Smithville (Missouri) | 5,038.73 mi (8,109.05 km) |
