How early should I arrive for my flight at SeaTac?

Seattle–Tacoma International Airport recommends arriving at least two hours prior to a domestic flight and three hours prior to an international flight. This timeframe allows passengers to check in, get through security screening, and reach their departure gate without undue stress. During peak travel periods, such as holidays or weekends, it may be wise to allow even more time, as the airport can become quite busy. Also, factors such as whether the traveler has checked baggage, if they have already completed online check-in, and the time of day can all influence the amount of time needed. It is always prudent to check the airport's official website for any updates or specific guidelines regarding your flight, as they can provide the most accurate and current information.