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| Domestic flights | ~120 min before departure |
| International flights | ~180 min before departure |
Atlanta is the world's busiest airport — TSA lines can be long during the morning peak (5-9am). The train between concourses is fast, but checkpoints get backed up. Consider TSA PreCheck or CLEAR if you fly here often.
Arrive at least 120 minutes before departure for a domestic flight at Atlanta (ATL).
Arrive at least 180 minutes before departure for an international flight at Atlanta (ATL).
Security and check-in congestion here is high — this airport is known for slower lines, so err toward the longer end or add extra buffer Atlanta is the world's busiest airport — TSA lines can be long during the morning peak (5-9am). The train between concourses is fast, but checkpoints get backed up. Consider TSA PreCheck or CLEAR if you fly here often.
Yes — bag-drop lines can add 15-30 minutes at busy airports, so lean toward the longer end of the recommended range if you're not carry-on only.