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Understanding DCA Security Wait Times helps you better plan your departure from Washington National Airport. Screening lines are usually busiest between 5 AM and 9 AM, when many flights take off. Traffic may increase again during evening departures. For a more relaxed experience, midday travel is often a good choice. Giving yourself a comfortable time buffer ensures you are not rushing through security. Checking live wait time estimates before heading out can help you adjust your arrival time and avoid surprises at the checkpoint.