| Zagarolo to Silver Firs (Washington) | 5,657.45 mi (9,104.79 km) |
| Zagarolo to Silver Spring (Maryland) | 4,497.10 mi (7,237.38 km) |
| Zagarolo to Silver Springs Shores (Florida) | 5,138.24 mi (8,269.19 km) |
| Zagarolo to Silverdale (Washington) | 5,682.12 mi (9,144.49 km) |
| Zagarolo to Silverton (Oregon) | 5,841.17 mi (9,400.46 km) |
| Zagarolo to Simi Valley (California) | 6,349.66 mi (10,218.79 km) |
| Zagarolo to Simpsonville (South Carolina) | 4,905.35 mi (7,894.40 km) |
| Zagarolo to Sioux City (Iowa) | 5,137.43 mi (8,267.89 km) |
| Zagarolo to Sioux Falls (South Dakota) | 5,100.79 mi (8,208.93 km) |
| Zagarolo to Skokie (Illinois) | 4,823.74 mi (7,763.06 km) |
| Zagarolo to Sleepy Hollow (New York) | 4,278.45 mi (6,885.50 km) |
| Zagarolo to Slidell (Louisiana) | 5,437.98 mi (8,751.58 km) |
| Zagarolo to Smithfield (North Carolina) | 4,697.02 mi (7,559.13 km) |
| Zagarolo to Smithfield (Utah) | 5,705.71 mi (9,182.45 km) |
| Zagarolo to Smithville (Missouri) | 5,214.01 mi (8,391.14 km) |
