| Katy to Smyrna (Delaware) | 1,320.79 mi (2,125.61 km) |
| Katy to Smyrna (Georgia) | 721.03 mi (1,160.38 km) |
| Katy to Smyrna (Tennessee) | 687.87 mi (1,107.01 km) |
| Katy to Snellville (Georgia) | 748.64 mi (1,204.81 km) |
| Katy to Snoqualmie (Washington) | 1,846.97 mi (2,972.41 km) |
| Katy to Snyder (Texas) | 361.43 mi (581.67 km) |
| Katy to Socastee (South Carolina) | 1,023.40 mi (1,647.00 km) |
| Katy to Socorro (Texas) | 632.00 mi (1,017.10 km) |
| Katy to Soddy-Daisy (Tennessee) | 726.26 mi (1,168.81 km) |
| Katy to Solana Beach (California) | 1,280.38 mi (2,060.57 km) |
| Katy to Soledad (California) | 1,540.68 mi (2,479.48 km) |
| Katy to Solon (Ohio) | 1,135.48 mi (1,827.37 km) |
| Katy to Somers Point (New Jersey) | 1,370.75 mi (2,206.01 km) |
| Katy to Somerset (Kentucky) | 819.16 mi (1,318.31 km) |
| Katy to Somerset (New Jersey) | 1,408.86 mi (2,267.34 km) |
