| Zachary to Smithville (Missouri) | 633.01 mi (1,018.73 km) |
| Zachary to Smyrna (Delaware) | 1,061.02 mi (1,707.54 km) |
| Zachary to Smyrna (Georgia) | 446.68 mi (718.86 km) |
| Zachary to Smyrna (Tennessee) | 453.73 mi (730.21 km) |
| Zachary to Snellville (Georgia) | 472.72 mi (760.77 km) |
| Zachary to Snoqualmie (Washington) | 1,994.80 mi (3,210.32 km) |
| Zachary to Snyder (Texas) | 590.10 mi (949.67 km) |
| Zachary to Socastee (South Carolina) | 740.35 mi (1,191.47 km) |
| Zachary to Socorro (Texas) | 894.49 mi (1,439.54 km) |
| Zachary to Soddy-Daisy (Tennessee) | 470.20 mi (756.71 km) |
| Zachary to Solana Beach (California) | 1,536.30 mi (2,472.43 km) |
| Zachary to Soledad (California) | 1,775.24 mi (2,856.97 km) |
| Zachary to Solon (Ohio) | 917.37 mi (1,476.37 km) |
| Zachary to Somers Point (New Jersey) | 1,108.86 mi (1,784.53 km) |
| Zachary to Somerset (Kentucky) | 581.04 mi (935.09 km) |
