What is the city code for Seattle, Washington?

The city code for Seattle, Washington is SEA. This code is derived from the first three letters of the city's name, making it straightforward and easy to remember for travelers and airline personnel alike. Seattle-Tacoma International Airport, commonly referred to as Sea-Tac Airport, uses this code for all its operations, including ticketing, baggage handling, and flight information. Therefore, SEA is the recognized abbreviation that travelers associate with Seattle, ensuring clarity in air travel communications.

The other choices represent different city codes: SLC is for Salt Lake City, SFO is for San Francisco, and STL is for St. Louis. Each of these codes follows the same structure, being a three-letter abbreviation. However, only SEA accurately corresponds to Seattle, reinforcing the importance of knowing the correct codes for navigating air travel effectively.