TSA Wait Times ORD can change quickly depending on the time of day and travel season. Early mornings and late afternoons are usually the busiest, especially on weekdays and holidays. Checking live updates before leaving for Chicago O’Hare can help you avoid unnecessary stress and plan your arrival better. Most airlines recommend getting to the airport at least two hours before a domestic flight and three hours before an international trip. If you travel often, services like PreCheck can speed things up. A little preparation goes a long way toward making your airport experience smoother and far more predictable.