Security wait times at Seattle-Tacoma International Airport (SEA) depend on factors like passenger flow, time of day, and checkpoint operations. Passengers are advised to arrive two hours prior to domestic departures and three hours prior to international flights. SEA Airport offers TSA PreCheck, CLEAR, and SEA Spot Saver to expedite security screening. Checking the flySEA App or the SEA Airport website provides real-time updates. Learn more in our related blog about Seatac security wait times.