| San Cugat del Valles to Silver Firs (Washington) | 5,387.68 mi (8,670.63 km) |
| San Cugat del Valles to Silver Spring (Maryland) | 4,021.71 mi (6,472.32 km) |
| San Cugat del Valles to Silver Springs Shores (Florida) | 4,634.54 mi (7,458.57 km) |
| San Cugat del Valles to Silverdale (Washington) | 5,413.87 mi (8,712.78 km) |
| San Cugat del Valles to Silverton (Oregon) | 5,560.32 mi (8,948.47 km) |
| San Cugat del Valles to Simi Valley (California) | 5,998.55 mi (9,653.73 km) |
| San Cugat del Valles to Simpsonville (South Carolina) | 4,423.60 mi (7,119.10 km) |
| San Cugat del Valles to Sioux City (Iowa) | 4,735.16 mi (7,620.50 km) |
| San Cugat del Valles to Sioux Falls (South Dakota) | 4,705.35 mi (7,572.53 km) |
| San Cugat del Valles to Skokie (Illinois) | 4,392.04 mi (7,068.30 km) |
| San Cugat del Valles to Sleepy Hollow (New York) | 3,806.20 mi (6,125.49 km) |
| San Cugat del Valles to Slidell (Louisiana) | 4,958.41 mi (7,979.79 km) |
| San Cugat del Valles to Smithfield (North Carolina) | 4,209.05 mi (6,773.82 km) |
| San Cugat del Valles to Smithfield (Utah) | 5,358.74 mi (8,624.05 km) |
| San Cugat del Valles to Smithville (Missouri) | 4,789.59 mi (7,708.11 km) |
