| Hemel Hempstead to Silver Firs (Washington) | 4,742.47 mi (7,632.26 km) |
| Hemel Hempstead to Silver Spring (Maryland) | 3,640.42 mi (5,858.69 km) |
| Hemel Hempstead to Silver Springs Shores (Florida) | 4,318.96 mi (6,950.69 km) |
| Hemel Hempstead to Silverdale (Washington) | 4,767.67 mi (7,672.82 km) |
| Hemel Hempstead to Silverton (Oregon) | 4,923.14 mi (7,923.03 km) |
| Hemel Hempstead to Simi Valley (California) | 5,422.11 mi (8,726.04 km) |
| Hemel Hempstead to Simpsonville (South Carolina) | 4,053.18 mi (6,522.97 km) |
| Hemel Hempstead to Sioux City (Iowa) | 4,220.87 mi (6,792.83 km) |
| Hemel Hempstead to Sioux Falls (South Dakota) | 4,181.88 mi (6,730.08 km) |
| Hemel Hempstead to Skokie (Illinois) | 3,923.58 mi (6,314.39 km) |
| Hemel Hempstead to Sleepy Hollow (New York) | 3,420.04 mi (5,504.02 km) |
| Hemel Hempstead to Slidell (Louisiana) | 4,578.51 mi (7,368.39 km) |
| Hemel Hempstead to Smithfield (North Carolina) | 3,855.82 mi (6,205.34 km) |
| Hemel Hempstead to Smithfield (Utah) | 4,778.16 mi (7,689.70 km) |
| Hemel Hempstead to Smithville (Missouri) | 4,307.63 mi (6,932.46 km) |
