| Zachary to Siloam Springs (Arkansas) | 427.93 mi (688.68 km) |
| Zachary to Silver Firs (Washington) | 2,017.49 mi (3,246.83 km) |
| Zachary to Silver Spring (Maryland) | 985.59 mi (1,586.16 km) |
| Zachary to Silver Springs Shores (Florida) | 558.24 mi (898.40 km) |
| Zachary to Silverdale (Washington) | 2,034.44 mi (3,274.11 km) |
| Zachary to Silverton (Oregon) | 1,971.19 mi (3,172.32 km) |
| Zachary to Simi Valley (California) | 1,622.18 mi (2,610.64 km) |
| Zachary to Simpsonville (South Carolina) | 588.76 mi (947.52 km) |
| Zachary to Sioux City (Iowa) | 866.93 mi (1,395.18 km) |
| Zachary to Sioux Falls (South Dakota) | 940.43 mi (1,513.48 km) |
| Zachary to Skokie (Illinois) | 808.28 mi (1,300.80 km) |
| Zachary to Sleepy Hollow (New York) | 1,202.99 mi (1,936.03 km) |
| Zachary to Slidell (Louisiana) | 86.21 mi (138.74 km) |
| Zachary to Smithfield (North Carolina) | 813.04 mi (1,308.47 km) |
| Zachary to Smithfield (Utah) | 1,380.31 mi (2,221.39 km) |
