| Hertford to Silver Firs (Washington) | 4,750.30 mi (7,644.87 km) |
| Hertford to Silver Spring (Maryland) | 3,655.37 mi (5,882.76 km) |
| Hertford to Silver Springs Shores (Florida) | 4,334.57 mi (6,975.82 km) |
| Hertford to Silverdale (Washington) | 4,775.46 mi (7,685.35 km) |
| Hertford to Silverton (Oregon) | 4,931.32 mi (7,936.19 km) |
| Hertford to Simi Valley (California) | 5,432.48 mi (8,742.74 km) |
| Hertford to Simpsonville (South Carolina) | 4,068.19 mi (6,547.12 km) |
| Hertford to Sioux City (Iowa) | 4,233.22 mi (6,812.71 km) |
| Hertford to Sioux Falls (South Dakota) | 4,194.02 mi (6,749.61 km) |
| Hertford to Skokie (Illinois) | 3,937.01 mi (6,336.00 km) |
| Hertford to Sleepy Hollow (New York) | 3,434.98 mi (5,528.07 km) |
| Hertford to Slidell (Louisiana) | 4,593.28 mi (7,392.16 km) |
| Hertford to Smithfield (North Carolina) | 3,871.09 mi (6,229.92 km) |
| Hertford to Smithfield (Utah) | 4,788.53 mi (7,706.40 km) |
| Hertford to Smithville (Missouri) | 4,320.69 mi (6,953.47 km) |
