| Alcazar de San Juan to Silver Firs (Washington) | 5,340.84 mi (8,595.25 km) |
| Alcazar de San Juan to Silver Spring (Maryland) | 3,832.35 mi (6,167.58 km) |
| Alcazar de San Juan to Silver Springs Shores (Florida) | 4,415.40 mi (7,105.90 km) |
| Alcazar de San Juan to Silverdale (Washington) | 5,367.79 mi (8,638.63 km) |
| Alcazar de San Juan to Silverton (Oregon) | 5,504.94 mi (8,859.35 km) |
| Alcazar de San Juan to Simi Valley (California) | 5,893.10 mi (9,484.03 km) |
| Alcazar de San Juan to Simpsonville (South Carolina) | 4,226.25 mi (6,801.49 km) |
| Alcazar de San Juan to Sioux City (Iowa) | 4,601.45 mi (7,405.31 km) |
| Alcazar de San Juan to Sioux Falls (South Dakota) | 4,577.00 mi (7,365.96 km) |
| Alcazar de San Juan to Skokie (Illinois) | 4,237.67 mi (6,819.86 km) |
| Alcazar de San Juan to Sleepy Hollow (New York) | 3,621.04 mi (5,827.49 km) |
| Alcazar de San Juan to Slidell (Louisiana) | 4,760.50 mi (7,661.29 km) |
| Alcazar de San Juan to Smithfield (North Carolina) | 4,006.99 mi (6,448.63 km) |
| Alcazar de San Juan to Smithfield (Utah) | 5,260.62 mi (8,466.15 km) |
| Alcazar de San Juan to Smithville (Missouri) | 4,638.44 mi (7,464.84 km) |
