| Guaynabo to Silver Firs (Washington) | 3,722.42 mi (5,990.65 km) |
| Guaynabo to Silver Spring (Maryland) | 1,567.61 mi (2,522.83 km) |
| Guaynabo to Silver Springs Shores (Florida) | 1,247.06 mi (2,006.96 km) |
| Guaynabo to Silverdale (Washington) | 3,743.58 mi (6,024.71 km) |
| Guaynabo to Silverton (Oregon) | 3,711.76 mi (5,973.50 km) |
| Guaynabo to Simi Valley (California) | 3,398.89 mi (5,469.98 km) |
| Guaynabo to Simpsonville (South Carolina) | 1,502.58 mi (2,418.16 km) |
| Guaynabo to Sioux City (Iowa) | 2,430.98 mi (3,912.29 km) |
| Guaynabo to Sioux Falls (South Dakota) | 2,485.81 mi (4,000.53 km) |
| Guaynabo to Skokie (Illinois) | 2,070.01 mi (3,331.35 km) |
| Guaynabo to Sleepy Hollow (New York) | 1,634.97 mi (2,631.23 km) |
| Guaynabo to Slidell (Louisiana) | 1,696.65 mi (2,730.49 km) |
| Guaynabo to Smithfield (North Carolina) | 1,400.29 mi (2,253.55 km) |
| Guaynabo to Smithfield (Utah) | 3,126.30 mi (5,031.30 km) |
| Guaynabo to Smithville (Missouri) | 2,234.48 mi (3,596.04 km) |
