Which airport code represents Seattle, Washington?

The airport code that represents Seattle, Washington, is SEA. This code is derived from the name of the city, making it easily identifiable for travelers and airline operations. Seattle-Tacoma International Airport, often referred to as Sea-Tac, uses this code to distinguish itself and facilitate flight scheduling, ticketing, and baggage handling.

Other options like SEY, SAC, and SYD do not correspond to Seattle. SEY is not associated with any major airport in Washington; instead, it might refer to a smaller facility. SAC is the code for Sacramento International Airport in California, while SYD is the airport code for Sydney Kingsford Smith Airport in Australia. The clarity and specificity of airport codes are essential for efficient air traffic management and passenger information.