| Penrith to Silver Firs (Washington) | 4,526.49 mi (7,284.68 km) |
| Penrith to Silver Spring (Maryland) | 3,493.21 mi (5,621.78 km) |
| Penrith to Silver Springs Shores (Florida) | 4,186.33 mi (6,737.25 km) |
| Penrith to Silverdale (Washington) | 4,551.51 mi (7,324.94 km) |
| Penrith to Silverton (Oregon) | 4,708.42 mi (7,577.48 km) |
| Penrith to Simi Valley (California) | 5,218.78 mi (8,398.82 km) |
| Penrith to Simpsonville (South Carolina) | 3,906.56 mi (6,287.01 km) |
| Penrith to Sioux City (Iowa) | 4,034.74 mi (6,493.28 km) |
| Penrith to Sioux Falls (South Dakota) | 3,993.56 mi (6,427.01 km) |
| Penrith to Skokie (Illinois) | 3,750.53 mi (6,035.89 km) |
| Penrith to Sleepy Hollow (New York) | 3,272.91 mi (5,267.25 km) |
| Penrith to Slidell (Louisiana) | 4,426.52 mi (7,123.79 km) |
| Penrith to Smithfield (North Carolina) | 3,715.28 mi (5,979.17 km) |
| Penrith to Smithfield (Utah) | 4,574.98 mi (7,362.72 km) |
| Penrith to Smithville (Missouri) | 4,129.50 mi (6,645.78 km) |
