Which airport code pertains to Seattle, Washington?

The airport code that pertains to Seattle, Washington, is SEA, which is short for Seattle-Tacoma International Airport. This code is widely recognized and used in travel itineraries, flight schedules, and airport signage. SEA specifically represents this major airport, which serves as a hub for numerous airlines and facilitates international and domestic travel.

The other codes do not relate to Seattle. PTH is an airport code for a location in Canada, SAN refers to San Diego International Airport in California, and PHL is the code for Philadelphia International Airport. Each airport code is unique and designated to its respective airport, ensuring clarity and efficiency in air travel.