TSA wait times Atlanta Hartsfield-Jackson International Airport (ATL) can vary depending on the time of day, day of the week, and whether you're traveling during peak seasons. As one of the busiest airports in the world, ATL often experiences longer security lines, especially during early morning or late afternoon hours. To minimize wait times, travelers are advised to arrive at least two hours before a domestic flight and three hours before an international flight. The TSA also offers a PreCheck program, which allows expedited security screening for approved travelers. For real-time updates on TSA wait times, ATL provides tools and apps that help passengers plan their arrival more efficiently.