| Alenquer to Silver Firs (Washington) | 5,166.97 mi (8,315.44 km) |
| Alenquer to Silver Spring (Maryland) | 3,558.21 mi (5,726.39 km) |
| Alenquer to Silver Springs Shores (Florida) | 4,123.15 mi (6,635.58 km) |
| Alenquer to Silverdale (Washington) | 5,194.44 mi (8,359.64 km) |
| Alenquer to Silverton (Oregon) | 5,323.14 mi (8,566.76 km) |
| Alenquer to Simi Valley (California) | 5,670.24 mi (9,125.37 km) |
| Alenquer to Simpsonville (South Carolina) | 3,946.28 mi (6,350.92 km) |
| Alenquer to Sioux City (Iowa) | 4,362.48 mi (7,020.73 km) |
| Alenquer to Sioux Falls (South Dakota) | 4,342.04 mi (6,987.83 km) |
| Alenquer to Skokie (Illinois) | 3,985.35 mi (6,413.81 km) |
| Alenquer to Sleepy Hollow (New York) | 3,350.20 mi (5,391.63 km) |
| Alenquer to Slidell (Louisiana) | 4,479.12 mi (7,208.45 km) |
| Alenquer to Smithfield (North Carolina) | 3,724.77 mi (5,994.43 km) |
| Alenquer to Smithfield (Utah) | 5,045.72 mi (8,120.29 km) |
| Alenquer to Smithville (Missouri) | 4,387.00 mi (7,060.20 km) |
