What is the city code for Seattle, Washington?

The city code for Seattle, Washington, is SEA. This code is derived from Seattle-Tacoma International Airport (SEA), which serves as the primary airport for the Seattle metropolitan area. The three-letter IATA airport code is used universally to identify the airport and the city it serves, making it easier for travelers to book flights, check luggage, and obtain travel information.

The other codes listed correspond to different locations: SFO is the airport code for San Francisco International Airport, SAC refers to Sacramento International Airport, and SHV is the code for Shreveport Regional Airport. Each of these codes is unique to their respective city and airport, which indicates why they are not applicable in this context. Seattle's designation as SEA effectively represents the city's aviation identity within the broader framework of airline travel.