Security wait times at Seattle-Tacoma International Airport (SEA) fluctuate based on passenger volume, time of day, and available checkpoints. For a hassle-free experience, travelers should plan to arrive two hours before domestic flights and three hours before international departures. SEA Airport offers TSA PreCheck, CLEAR, and SEA Spot Saver to speed up the process. Checking the flySEA App or the SEA Airport website for real-time updates can help avoid delays. Read our related blog on Seattle Airport TSA wait time for more details.