| Valley Center to Siloam Springs (Arkansas) | 1,290.27 mi (2,076.48 km) |
| Valley Center to Silver Firs (Washington) | 1,045.57 mi (1,682.68 km) |
| Valley Center to Silver Spring (Maryland) | 2,249.19 mi (3,619.72 km) |
| Valley Center to Silver Springs Shores (Florida) | 2,078.94 mi (3,345.72 km) |
| Valley Center to Silverdale (Washington) | 1,040.07 mi (1,673.83 km) |
| Valley Center to Silverton (Oregon) | 869.37 mi (1,399.12 km) |
| Valley Center to Simi Valley (California) | 122.52 mi (197.17 km) |
| Valley Center to Simpsonville (South Carolina) | 1,984.26 mi (3,193.35 km) |
| Valley Center to Sioux City (Iowa) | 1,289.35 mi (2,075.01 km) |
| Valley Center to Sioux Falls (South Dakota) | 1,303.73 mi (2,098.14 km) |
| Valley Center to Skokie (Illinois) | 1,703.16 mi (2,740.97 km) |
| Valley Center to Sleepy Hollow (New York) | 2,411.19 mi (3,880.44 km) |
| Valley Center to Slidell (Louisiana) | 1,608.15 mi (2,588.07 km) |
| Valley Center to Smithfield (North Carolina) | 2,196.63 mi (3,535.14 km) |
| Valley Center to Smithfield (Utah) | 658.51 mi (1,059.76 km) |
