| Howard to Silver Firs (Washington) | 1,630.50 mi (2,624.04 km) |
| Howard to Silver Spring (Maryland) | 687.04 mi (1,105.69 km) |
| Howard to Silver Springs Shores (Florida) | 1,118.81 mi (1,800.55 km) |
| Howard to Silverdale (Washington) | 1,656.38 mi (2,665.69 km) |
| Howard to Silverton (Oregon) | 1,688.17 mi (2,716.85 km) |
| Howard to Simi Valley (California) | 1,770.99 mi (2,850.14 km) |
| Howard to Simpsonville (South Carolina) | 747.00 mi (1,202.18 km) |
| Howard to Sioux City (Iowa) | 439.40 mi (707.14 km) |
| Howard to Sioux Falls (South Dakota) | 434.59 mi (699.41 km) |
| Howard to Skokie (Illinois) | 176.00 mi (283.24 km) |
| Howard to Sleepy Hollow (New York) | 758.35 mi (1,220.45 km) |
| Howard to Slidell (Louisiana) | 991.05 mi (1,594.94 km) |
| Howard to Smithfield (North Carolina) | 809.46 mi (1,302.70 km) |
| Howard to Smithfield (Utah) | 1,205.79 mi (1,940.53 km) |
| Howard to Smithville (Missouri) | 488.41 mi (786.01 km) |
