| Quincy to Silver Firs (Washington) | 2,479.11 mi (3,989.74 km) |
| Quincy to Silver Spring (Maryland) | 386.39 mi (621.83 km) |
| Quincy to Silver Springs Shores (Florida) | 1,095.54 mi (1,763.09 km) |
| Quincy to Silverdale (Washington) | 2,505.98 mi (4,032.98 km) |
| Quincy to Silverton (Oregon) | 2,551.41 mi (4,106.11 km) |
| Quincy to Simi Valley (California) | 2,612.48 mi (4,204.38 km) |
| Quincy to Simpsonville (South Carolina) | 798.43 mi (1,284.95 km) |
| Quincy to Sioux City (Iowa) | 1,290.31 mi (2,076.56 km) |
| Quincy to Sioux Falls (South Dakota) | 1,299.35 mi (2,091.11 km) |
| Quincy to Skokie (Illinois) | 855.39 mi (1,376.62 km) |
| Quincy to Sleepy Hollow (New York) | 167.55 mi (269.65 km) |
| Quincy to Slidell (Louisiana) | 1,327.34 mi (2,136.14 km) |
| Quincy to Smithfield (North Carolina) | 609.54 mi (980.96 km) |
| Quincy to Smithfield (Utah) | 2,073.75 mi (3,337.38 km) |
| Quincy to Smithville (Missouri) | 1,243.30 mi (2,000.89 km) |
