Travelers departing from the airport should always monitor Denver International Airport TSA Security Wait Times before heading to the terminal. As one of the busiest airports in the United States, DEN experiences high passenger traffic during early mornings, weekends, and peak holiday seasons. On average, Denver International Airport TSA Security Wait Time ranges between 15 and 40 minutes, depending on travel demand and checkpoint availability.To minimize delays, passengers are encouraged to arrive at least two hours before domestic departures and three hours before international flights. TSA PreCheck lanes are available and often move significantly faster than standard lines.