| Boone to Silver Firs (Washington) | 2,197.85 mi (3,537.10 km) |
| Boone to Silver Spring (Maryland) | 319.12 mi (513.57 km) |
| Boone to Silver Springs Shores (Florida) | 490.88 mi (789.99 km) |
| Boone to Silverdale (Washington) | 2,221.05 mi (3,574.43 km) |
| Boone to Silverton (Oregon) | 2,214.57 mi (3,564.01 km) |
| Boone to Simi Valley (California) | 2,084.23 mi (3,354.24 km) |
| Boone to Simpsonville (South Carolina) | 107.67 mi (173.28 km) |
| Boone to Sioux City (Iowa) | 896.70 mi (1,443.09 km) |
| Boone to Sioux Falls (South Dakota) | 943.52 mi (1,518.45 km) |
| Boone to Skokie (Illinois) | 517.33 mi (832.56 km) |
| Boone to Sleepy Hollow (New York) | 538.78 mi (867.08 km) |
| Boone to Slidell (Louisiana) | 621.93 mi (1,000.90 km) |
| Boone to Smithfield (North Carolina) | 191.90 mi (308.84 km) |
| Boone to Smithfield (Utah) | 1,655.68 mi (2,664.57 km) |
| Boone to Smithville (Missouri) | 737.38 mi (1,186.69 km) |
