| Castagneto Carducci to Silver Firs (Washington) | 5,521.41 mi (8,885.85 km) |
| Castagneto Carducci to Silver Spring (Maryland) | 4,352.44 mi (7,004.57 km) |
| Castagneto Carducci to Silver Springs Shores (Florida) | 4,996.53 mi (8,041.13 km) |
| Castagneto Carducci to Silverdale (Washington) | 5,546.27 mi (8,925.86 km) |
| Castagneto Carducci to Silverton (Oregon) | 5,704.06 mi (9,179.79 km) |
| Castagneto Carducci to Simi Valley (California) | 6,206.49 mi (9,988.39 km) |
| Castagneto Carducci to Simpsonville (South Carolina) | 4,761.10 mi (7,662.25 km) |
| Castagneto Carducci to Sioux City (Iowa) | 4,991.39 mi (8,032.87 km) |
| Castagneto Carducci to Sioux Falls (South Dakota) | 4,954.95 mi (7,974.23 km) |
| Castagneto Carducci to Skokie (Illinois) | 4,677.37 mi (7,527.51 km) |
| Castagneto Carducci to Sleepy Hollow (New York) | 4,133.62 mi (6,652.42 km) |
| Castagneto Carducci to Slidell (Louisiana) | 5,293.41 mi (8,518.91 km) |
| Castagneto Carducci to Smithfield (North Carolina) | 4,553.44 mi (7,328.05 km) |
| Castagneto Carducci to Smithfield (Utah) | 5,562.58 mi (8,952.11 km) |
| Castagneto Carducci to Smithville (Missouri) | 5,067.64 mi (8,155.57 km) |
