Seattle-Tacoma International Airport (SEA) security wait times vary depending on passenger traffic, time of day, and checkpoint operations. To ensure a smooth journey, travelers should arrive at least two hours before domestic flights and three hours before international departures. SEA Airport provides expedited screening options like TSA PreCheck, CLEAR, and SEA Spot Saver to reduce wait times. For the latest updates, passengers can check the flySEA App or the SEA Airport website. To learn more, read our related blog on Seatac wait times.