ORD TSA Wait Times can vary depending on the time of day and season. Early mornings and late afternoons are usually the busiest, especially on weekdays and during holidays. Since O'Hare International Airport handles a high volume of travelers daily, planning ahead is important. Arriving at least two hours before a domestic flight gives you a comfortable buffer. Programs like TSA PreCheck can help speed things up if you qualify. Checking live updates before leaving for the airport is also a smart move. A little preparation goes a long way toward starting your trip without unnecessary stress or last minute rushing.