| Katy to Security-Widefield (Colorado) | 799.20 mi (1,286.19 km) |
| Katy to Sedalia (Missouri) | 633.57 mi (1,019.64 km) |
| Katy to Sedro-Woolley (Washington) | 1,898.87 mi (3,055.93 km) |
| Katy to Seguin (Texas) | 128.74 mi (207.19 km) |
| Katy to Selden (New York) | 1,488.61 mi (2,395.69 km) |
| Katy to Selma (Alabama) | 551.20 mi (887.07 km) |
| Katy to Selma (California) | 1,448.13 mi (2,330.54 km) |
| Katy to Selma (Texas) | 149.39 mi (240.43 km) |
| Katy to Seminole (Florida) | 800.99 mi (1,289.07 km) |
| Katy to Seven Hills (Ohio) | 1,126.00 mi (1,812.12 km) |
| Katy to Seven Oaks (South Carolina) | 909.40 mi (1,463.54 km) |
| Katy to Severn (Maryland) | 1,263.24 mi (2,032.99 km) |
| Katy to Severna Park (Maryland) | 1,268.02 mi (2,040.68 km) |
| Katy to Sevierville (Tennessee) | 826.41 mi (1,329.98 km) |
| Katy to Seymour (Indiana) | 848.55 mi (1,365.60 km) |
