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Atlanta Airport Busiest Times experiences heavy traffic at certain times. Early mornings, from 6 a.m. to 9 a.m., and late afternoons, 4 p.m. to 6 p.m., are especially busy. Weekends, holidays, and school breaks add extra congestion. Security checkpoints and boarding gates can be slow during these periods. Travelers can save time by using TSA PreCheck, mobile boarding passes, and choosing mid-morning or mid-afternoon flights. Eating and shopping during off-peak hours also helps avoid long lines. Planning around the busiest times makes navigating the airport easier, letting you start your trip calm, prepared, and on schedule.