| Seaford to Silver Firs (Washington) | 4,811.30 mi (7,743.04 km) |
| Seaford to Silver Spring (Maryland) | 3,685.47 mi (5,931.19 km) |
| Seaford to Silver Springs Shores (Florida) | 4,358.74 mi (7,014.71 km) |
| Seaford to Silverdale (Washington) | 4,836.58 mi (7,783.72 km) |
| Seaford to Silverton (Oregon) | 4,991.45 mi (8,032.96 km) |
| Seaford to Simi Valley (California) | 5,486.01 mi (8,828.87 km) |
| Seaford to Simpsonville (South Carolina) | 4,097.79 mi (6,594.76 km) |
| Seaford to Sioux City (Iowa) | 4,278.85 mi (6,886.14 km) |
| Seaford to Sioux Falls (South Dakota) | 4,240.64 mi (6,824.64 km) |
| Seaford to Skokie (Illinois) | 3,977.17 mi (6,400.63 km) |
| Seaford to Sleepy Hollow (New York) | 3,465.21 mi (5,576.72 km) |
| Seaford to Slidell (Louisiana) | 4,624.66 mi (7,442.67 km) |
| Seaford to Smithfield (North Carolina) | 3,898.51 mi (6,274.05 km) |
| Seaford to Smithfield (Utah) | 4,842.09 mi (7,792.60 km) |
| Seaford to Smithville (Missouri) | 4,362.81 mi (7,021.27 km) |
